diff --git a/packages/jsparse/parser.js b/packages/jsparse/parser.js
index f67d644b36..ebc29f741c 100644
--- a/packages/jsparse/parser.js
+++ b/packages/jsparse/parser.js
@@ -124,7 +124,7 @@ var parse = function (tokenizer) {
 
   var primaryOrFunctionExpression =
         expecting('expression',
-                  or(node('this', seq(token('this'))),
+                  or(node('this', token('this')), // XXXX remove unnecessary seqs in node(...) args
                      node('identifier', seq(tokenClass('IDENTIFIER'))),
                      node('number', seq(tokenClass('NUMBER'))),
                      node('boolean', seq(tokenClass('BOOLEAN'))),
diff --git a/packages/jsparse/parserlib.js b/packages/jsparse/parserlib.js
index 2325767f9b..8ccf623ca9 100644
--- a/packages/jsparse/parserlib.js
+++ b/packages/jsparse/parserlib.js
@@ -163,6 +163,8 @@ var node = function (name, childrenParser) {
     var children = childrenParser.parse(t);
     if (! children)
       return null;
+    if (! isArray(children))
+      children = [children];
     return new ParseNode(name, children);
   });
 };
@@ -246,6 +248,7 @@ var unary = function (name, termParser, opParser) {
 // `x` => ["x"]
 // `x,y` => ["x", ",", "y"]
 // `x,y,z` => ["x", ",", "y", ",", "z"]
+// Unpacks.
 var list = function (itemParser, sepParser) {
   var push = function(array, newThing) {
     if (isArray(newThing))
@@ -277,6 +280,7 @@ var list = function (itemParser, sepParser) {
     });
 };
 
+// Unpacks arrays (nested seqs).
 var seq = function (/*parsers*/) {
   var args = arguments;
   if (! args.length)