diff --git a/lib/nodes.js b/lib/nodes.js
index 5ce2a6da..f0e96f82 100644
--- a/lib/nodes.js
+++ b/lib/nodes.js
@@ -162,10 +162,10 @@
     return Base;
   }();
   exports.Expressions = Expressions = function() {
+    __extends(Expressions, Base);
     function Expressions(nodes) {
       this.expressions = compact(flatten(nodes || []));
     }
-    __extends(Expressions, Base);
     Expressions.prototype.children = ['expressions'];
     Expressions.prototype.push = function(node) {
       this.expressions.push(node);
@@ -298,10 +298,10 @@
     return Expressions;
   }();
   exports.Literal = Literal = function() {
+    __extends(Literal, Base);
     function Literal(value) {
       this.value = value;
     }
-    __extends(Literal, Base);
     Literal.prototype.makeReturn = function() {
       if (this.isPureStatement()) {
         return this;
@@ -333,10 +333,10 @@
     return Literal;
   }();
   exports.Return = Return = function() {
+    __extends(Return, Base);
     function Return(expression) {
       this.expression = expression;
     }
-    __extends(Return, Base);
     Return.prototype.children = ['expression'];
     Return.prototype.isStatement = YES;
     Return.prototype.isPureStatement = YES;
@@ -357,6 +357,7 @@
     return Return;
   }();
   exports.Value = Value = function() {
+    __extends(Value, Base);
     function Value(base, props, tag) {
       if (!props && base instanceof Value) {
         return base;
@@ -368,7 +369,6 @@
       }
       return this;
     }
-    __extends(Value, Base);
     Value.prototype.children = ['base', 'properties'];
     Value.prototype.push = function(prop) {
       this.properties.push(prop);
@@ -492,10 +492,10 @@
     return Value;
   }();
   exports.Comment = Comment = function() {
+    __extends(Comment, Base);
     function Comment(comment) {
       this.comment = comment;
     }
-    __extends(Comment, Base);
     Comment.prototype.isPureStatement = YES;
     Comment.prototype.isStatement = YES;
     Comment.prototype.makeReturn = THIS;
@@ -510,6 +510,7 @@
     return Comment;
   }();
   exports.Call = Call = function() {
+    __extends(Call, Base);
     function Call(variable, args, soak) {
       this.args = args != null ? args : [];
       this.soak = soak;
@@ -517,7 +518,6 @@
       this.isSuper = variable === 'super';
       this.variable = this.isSuper ? null : variable;
     }
-    __extends(Call, Base);
     Call.prototype.children = ['variable', 'args'];
     Call.prototype.newInstance = function() {
       var base;
@@ -647,11 +647,11 @@
     return Call;
   }();
   exports.Extends = Extends = function() {
+    __extends(Extends, Base);
     function Extends(child, parent) {
       this.child = child;
       this.parent = parent;
     }
-    __extends(Extends, Base);
     Extends.prototype.children = ['child', 'parent'];
     Extends.prototype.compile = function(o) {
       utility('hasProp');
@@ -660,12 +660,12 @@
     return Extends;
   }();
   exports.Access = Access = function() {
+    __extends(Access, Base);
     function Access(name, tag) {
       this.name = name;
       this.proto = tag === 'proto' ? '.prototype' : '';
       this.soak = tag === 'soak';
     }
-    __extends(Access, Base);
     Access.prototype.children = ['name'];
     Access.prototype.compile = function(o) {
       var name;
@@ -676,10 +676,10 @@
     return Access;
   }();
   exports.Index = Index = function() {
+    __extends(Index, Base);
     function Index(index) {
       this.index = index;
     }
-    __extends(Index, Base);
     Index.prototype.children = ['index'];
     Index.prototype.compile = function(o) {
       return (this.proto ? '.prototype' : '') + ("[" + (this.index.compile(o, LEVEL_PAREN)) + "]");
@@ -690,14 +690,14 @@
     return Index;
   }();
   exports.Range = Range = function() {
+    __extends(Range, Base);
+    Range.prototype.children = ['from', 'to'];
     function Range(from, to, tag) {
       this.from = from;
       this.to = to;
       this.exclusive = tag === 'exclusive';
       this.equals = this.exclusive ? '' : '=';
     }
-    __extends(Range, Base);
-    Range.prototype.children = ['from', 'to'];
     Range.prototype.compileVariables = function(o) {
       var parts, _ref, _ref2, _ref3;
       o = merge(o, {
@@ -775,12 +775,12 @@
     return Range;
   }();
   exports.Slice = Slice = function() {
+    __extends(Slice, Base);
+    Slice.prototype.children = ['range'];
     function Slice(range) {
       this.range = range;
       Slice.__super__.constructor.call(this);
     }
-    __extends(Slice, Base);
-    Slice.prototype.children = ['range'];
     Slice.prototype.compileNode = function(o) {
       var from, to;
       from = this.range.from ? this.range.from.compile(o) : '0';
@@ -794,11 +794,11 @@
     return Slice;
   }();
   exports.Obj = Obj = function() {
+    __extends(Obj, Base);
     function Obj(props, generated) {
       this.generated = generated != null ? generated : false;
       this.objects = this.properties = props || [];
     }
-    __extends(Obj, Base);
     Obj.prototype.children = ['properties'];
     Obj.prototype.compileNode = function(o) {
       var i, idt, indent, join, lastNoncom, nonComments, obj, prop, props, _i, _len, _len2, _ref, _results, _results2;
@@ -860,10 +860,10 @@
     return Obj;
   }();
   exports.Arr = Arr = function() {
+    __extends(Arr, Base);
     function Arr(objs) {
       this.objects = objs || [];
     }
-    __extends(Arr, Base);
     Arr.prototype.children = ['objects'];
     Arr.prototype.compileNode = function(o) {
       var code, obj, _i, _len, _ref, _results;
@@ -903,13 +903,13 @@
     return Arr;
   }();
   exports.Class = Class = function() {
+    __extends(Class, Base);
     function Class(variable, parent, body) {
       this.variable = variable;
       this.parent = parent;
       this.body = body != null ? body : new Expressions;
       this.boundFuncs = [];
     }
-    __extends(Class, Base);
     Class.prototype.children = ['variable', 'parent', 'body'];
     Class.prototype.determineName = function() {
       var decl, tail;
@@ -961,11 +961,10 @@
               throw new Error('cannot define a constructor as a bound function');
             }
             if (func instanceof Code) {
-              this.ctor = func;
+              assign = this.ctor = func;
             } else {
-              this.ctor = new Assign(new Value(new Literal(name)), func);
+              assign = this.ctor = new Assign(new Value(new Literal(name)), func);
             }
-            assign = null;
           } else {
             if (!assign.variable["this"]) {
               assign.variable = new Value(new Literal(name), [new Access(base, 'proto')]);
@@ -991,10 +990,10 @@
           for (i = 0, _len = _ref.length; i < _len; i++) {
             node = _ref[i];
             if (node instanceof Value && node.isObject(true)) {
-              exps[i] = compact(this.addProperties(node, name));
+              exps[i] = this.addProperties(node, name);
             }
           }
-          return child.expressions = exps = compact(flatten(exps));
+          return child.expressions = exps = flatten(exps);
         }
       }, this));
     };
@@ -1004,6 +1003,7 @@
         if (this.parent) {
           this.ctor.body.push(new Call('super', [new Splat(new Literal('arguments'))]));
         }
+        this.body.expressions.unshift(this.ctor);
       }
       this.ctor.ctor = this.ctor.name = name;
       this.ctor.klass = null;
@@ -1016,11 +1016,10 @@
       lname = new Literal(name);
       this.setContext(name);
       this.walkBody(name);
-      this.ensureConstructor(name);
       if (this.parent) {
         this.body.expressions.unshift(new Extends(lname, this.parent));
       }
-      this.body.expressions.unshift(this.ctor);
+      this.ensureConstructor(name);
       this.body.expressions.push(lname);
       this.addBoundFunctions(o);
       klass = new Parens(new Call(new Code([], this.body)), true);
@@ -1032,12 +1031,12 @@
     return Class;
   }();
   exports.Assign = Assign = function() {
+    __extends(Assign, Base);
     function Assign(variable, value, context) {
       this.variable = variable;
       this.value = value;
       this.context = context;
     }
-    __extends(Assign, Base);
     Assign.prototype.METHOD_DEF = /^(?:(\S+)\.prototype\.|\S+?)?\b([$A-Za-z_][$\w]*)$/;
     Assign.prototype.children = ['variable', 'value'];
     Assign.prototype.assigns = function(name) {
@@ -1190,6 +1189,7 @@
     return Assign;
   }();
   exports.Code = Code = function() {
+    __extends(Code, Base);
     function Code(params, body, tag) {
       this.params = params || [];
       this.body = body || new Expressions;
@@ -1198,7 +1198,6 @@
         this.context = 'this';
       }
     }
-    __extends(Code, Base);
     Code.prototype.children = ['params', 'body'];
     Code.prototype.isStatement = function() {
       return !!this.ctor;
@@ -1298,12 +1297,12 @@
     return Code;
   }();
   exports.Param = Param = function() {
+    __extends(Param, Base);
     function Param(name, value, splat) {
       this.name = name;
       this.value = value;
       this.splat = splat;
     }
-    __extends(Param, Base);
     Param.prototype.children = ['name', 'value'];
     Param.prototype.compile = function(o) {
       return this.name.compile(o, LEVEL_LIST);
@@ -1334,12 +1333,12 @@
     return Param;
   }();
   exports.Splat = Splat = function() {
-    function Splat(name) {
-      this.name = name.compile ? name : new Literal(name);
-    }
     __extends(Splat, Base);
     Splat.prototype.children = ['name'];
     Splat.prototype.isAssignable = YES;
+    function Splat(name) {
+      this.name = name.compile ? name : new Literal(name);
+    }
     Splat.prototype.assigns = function(name) {
       return this.name.assigns(name);
     };
@@ -1389,11 +1388,11 @@
     return Splat;
   }();
   exports.While = While = function() {
+    __extends(While, Base);
     function While(condition, options) {
       this.condition = (options != null ? options.invert : void 0) ? condition.invert() : condition;
       this.guard = options != null ? options.guard : void 0;
     }
-    __extends(While, Base);
     While.prototype.children = ['condition', 'guard', 'body'];
     While.prototype.isStatement = YES;
     While.prototype.makeReturn = function() {
@@ -1452,6 +1451,7 @@
   }();
   exports.Op = Op = function() {
     var CONVERSIONS, INVERSIONS;
+    __extends(Op, Base);
     function Op(op, first, second, flip) {
       if (op === 'in') {
         return new In(first, second);
@@ -1470,7 +1470,6 @@
       this.flip = !!flip;
       return this;
     }
-    __extends(Op, Base);
     CONVERSIONS = {
       '==': '===',
       '!=': '!==',
@@ -1583,11 +1582,11 @@
     return Op;
   }();
   exports.In = In = function() {
+    __extends(In, Base);
     function In(object, array) {
       this.object = object;
       this.array = array;
     }
-    __extends(In, Base);
     In.prototype.children = ['object', 'array'];
     In.prototype.invert = NEGATE;
     In.prototype.compileNode = function(o) {
@@ -1637,13 +1636,13 @@
     return In;
   }();
   exports.Try = Try = function() {
+    __extends(Try, Base);
     function Try(attempt, error, recovery, ensure) {
       this.attempt = attempt;
       this.error = error;
       this.recovery = recovery;
       this.ensure = ensure;
     }
-    __extends(Try, Base);
     Try.prototype.children = ['attempt', 'recovery', 'ensure'];
     Try.prototype.isStatement = YES;
     Try.prototype.makeReturn = function() {
@@ -1665,10 +1664,10 @@
     return Try;
   }();
   exports.Throw = Throw = function() {
+    __extends(Throw, Base);
     function Throw(expression) {
       this.expression = expression;
     }
-    __extends(Throw, Base);
     Throw.prototype.children = ['expression'];
     Throw.prototype.isStatement = YES;
     Throw.prototype.makeReturn = THIS;
@@ -1678,10 +1677,10 @@
     return Throw;
   }();
   exports.Existence = Existence = function() {
+    __extends(Existence, Base);
     function Existence(expression) {
       this.expression = expression;
     }
-    __extends(Existence, Base);
     Existence.prototype.children = ['expression'];
     Existence.prototype.invert = NEGATE;
     Existence.prototype.compileNode = function(o) {
@@ -1697,10 +1696,10 @@
     return Existence;
   }();
   exports.Parens = Parens = function() {
+    __extends(Parens, Base);
     function Parens(body) {
       this.body = body;
     }
-    __extends(Parens, Base);
     Parens.prototype.children = ['body'];
     Parens.prototype.unwrap = function() {
       return this.body;
@@ -1729,6 +1728,7 @@
     return Parens;
   }();
   exports.For = For = function() {
+    __extends(For, Base);
     function For(body, source, name, index) {
       var _ref;
       this.name = name;
@@ -1753,7 +1753,6 @@
       }
       this.returns = false;
     }
-    __extends(For, Base);
     For.prototype.children = ['body', 'source', 'guard', 'step'];
     For.prototype.isStatement = YES;
     For.prototype.makeReturn = function() {
@@ -1877,12 +1876,12 @@
     return For;
   }();
   exports.Switch = Switch = function() {
+    __extends(Switch, Base);
     function Switch(subject, cases, otherwise) {
       this.subject = subject;
       this.cases = cases;
       this.otherwise = otherwise;
     }
-    __extends(Switch, Base);
     Switch.prototype.children = ['subject', 'cases', 'otherwise'];
     Switch.prototype.isStatement = YES;
     Switch.prototype.makeReturn = function() {
@@ -1938,6 +1937,7 @@
     return Switch;
   }();
   exports.If = If = function() {
+    __extends(If, Base);
     function If(condition, body, options) {
       this.body = body;
       if (options == null) {
@@ -1948,7 +1948,6 @@
       this.isChain = false;
       this.soak = options.soak;
     }
-    __extends(If, Base);
     If.prototype.children = ['condition', 'body', 'elseBody'];
     If.prototype.bodyNode = function() {
       var _ref;
diff --git a/lib/scope.js b/lib/scope.js
index 5097955e..c9c1cbc5 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -2,6 +2,7 @@
   var Scope, extend, last, _ref;
   _ref = require('./helpers'), extend = _ref.extend, last = _ref.last;
   exports.Scope = Scope = function() {
+    Scope.root = null;
     function Scope(parent, expressions, method) {
       this.parent = parent;
       this.expressions = expressions;
@@ -17,7 +18,6 @@
         Scope.root = this;
       }
     }
-    Scope.root = null;
     Scope.prototype.add = function(name, type) {
       var pos;
       if (typeof (pos = this.positions[name]) === 'number') {
diff --git a/src/nodes.coffee b/src/nodes.coffee
index cfb96ac6..e871ba76 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -775,10 +775,9 @@ exports.Class = class Class extends Base
           if func.bound
             throw new Error 'cannot define a constructor as a bound function'
           if func instanceof Code
-            @ctor = func
+            assign = @ctor = func
           else
-            @ctor = new Assign(new Value(new Literal name), func)
-          assign = null
+            assign = @ctor = new Assign(new Value(new Literal name), func)
         else
           unless assign.variable.this
             assign.variable = new Value(new Literal(name), [new Access(base, 'proto')])
@@ -794,8 +793,8 @@ exports.Class = class Class extends Base
       if child instanceof Expressions
         for node, i in exps = child.expressions
           if node instanceof Value and node.isObject(true)
-            exps[i] = compact @addProperties node, name
-        child.expressions = exps = compact flatten exps
+            exps[i] = @addProperties node, name
+        child.expressions = exps = flatten exps
 
   # Make sure that a constructor is defined for the class, and properly
   # configured.
@@ -803,6 +802,7 @@ exports.Class = class Class extends Base
     if not @ctor
       @ctor = new Code
       @ctor.body.push new Call 'super', [new Splat new Literal 'arguments'] if @parent
+      @body.expressions.unshift @ctor
     @ctor.ctor     = @ctor.name = name
     @ctor.klass    = null
     @ctor.noReturn = yes
@@ -817,9 +817,8 @@ exports.Class = class Class extends Base
 
     @setContext name
     @walkBody name
-    @ensureConstructor name
     @body.expressions.unshift new Extends lname, @parent if @parent
-    @body.expressions.unshift @ctor
+    @ensureConstructor name
     @body.expressions.push lname
     @addBoundFunctions o
 
diff --git a/test/test_classes.coffee b/test/test_classes.coffee
index 53ce2f9f..b80580c0 100644
--- a/test/test_classes.coffee
+++ b/test/test_classes.coffee
@@ -331,3 +331,18 @@ class Outer
 
 eq (new Outer).label, 'outer'
 eq (new Outer.Inner).label, 'inner'
+
+
+# Variables in constructor bodies are correctly scoped.
+class A
+  x = 1
+  constructor: ->
+    x = 10
+    y = 20
+  y = 2
+  captured: ->
+    {x, y}
+
+a = new A
+eq a.captured().x, 10
+eq a.captured().y, 2