diff --git a/examples/underscore.cs b/examples/underscore.cs
index 20b1fafe..56abbb53 100644
--- a/examples/underscore.cs
+++ b/examples/underscore.cs
@@ -26,7 +26,7 @@ breaker: if typeof(StopIteration) is 'undefined' then '__break__' else StopItera
 _: root._: obj => new wrapper(obj).
 
 # Export the Underscore object for CommonJS.
-exports._: _ if typeof(exports) aint 'undefined'
+if typeof(exports) != 'undefined' then exports._: _.
 
 # Create quick reference variables for speed access to core prototypes.
 slice:                Array.prototype.slice
diff --git a/lib/coffee_script/lexer.rb b/lib/coffee_script/lexer.rb
index b511d0a7..a67e3050 100644
--- a/lib/coffee_script/lexer.rb
+++ b/lib/coffee_script/lexer.rb
@@ -22,7 +22,7 @@ module CoffeeScript
     NUMBER     = /\A\b((0(x|X)[0-9a-fA-F]+)|([0-9]+(\.[0-9]+)?(e[+\-]?[0-9]+)?))\b/i
     STRING     = /\A(""|''|"(.*?)[^\\]"|'(.*?)[^\\]')/m
     JS         = /\A(``|`(.*?)[^\\]`)/m
-    OPERATOR   = /\A([+\*&|\/\-%=<>:]+)/
+    OPERATOR   = /\A([+\*&|\/\-%=<>:!]+)/
     WHITESPACE = /\A([ \t\r]+)/
     NEWLINE    = /\A(\n+)/
     COMMENT    = /\A((#[^\n]*\s*)+)/m