diff --git a/lib/nodes.js b/lib/nodes.js
index 9eb506bbb0..6f6736c70d 100644
--- a/lib/nodes.js
+++ b/lib/nodes.js
@@ -1,5 +1,5 @@
 (function() {
-  var Access, Arr, Assign, Base, Block, Call, Class, Closure, Code, Comment, Existence, Extends, For, IDENTIFIER, IS_STRING, If, In, Index, LEVEL_ACCESS, LEVEL_COND, LEVEL_LIST, LEVEL_OP, LEVEL_PAREN, LEVEL_TOP, Literal, NEGATE, NO, Obj, Op, Param, Parens, Push, Range, Return, SIMPLENUM, Scope, Slice, Splat, Switch, TAB, THIS, Throw, Try, UTILITIES, Value, While, YES, compact, del, ends, extend, flatten, last, merge, multident, starts, unfoldSoak, utility, _ref;
+  var Access, Arr, Assign, Base, Block, Call, Class, Closure, Code, Comment, Existence, Extends, For, IDENTIFIER, IS_STRING, If, In, Index, LEVEL_ACCESS, LEVEL_COND, LEVEL_LIST, LEVEL_OP, LEVEL_PAREN, LEVEL_TOP, Literal, METHOD_DEF, NEGATE, NO, Obj, Op, Param, Parens, Push, Range, Return, SIMPLENUM, Scope, Slice, Splat, Switch, TAB, THIS, Throw, Try, UTILITIES, Value, While, YES, compact, del, ends, extend, flatten, last, merge, multident, starts, unfoldSoak, utility, _ref;
   var __hasProp = Object.prototype.hasOwnProperty, __extends = function(child, parent) {
     for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; }
     function ctor() { this.constructor = child; }
@@ -1132,7 +1132,6 @@
       this.context = context;
       this.param = options && options.param;
     }
-    Assign.prototype.METHOD_DEF = /^(?:(\S+)\.prototype\.|\S+?)?\b([$A-Za-z_][$\w\x7f-\uffff]*)$/;
     Assign.prototype.children = ['variable', 'value'];
     Assign.prototype.assigns = function(name) {
       return this[this.context === 'object' ? 'value' : 'variable'].assigns(name);
@@ -1164,7 +1163,7 @@
           o.scope.find(name);
         }
       }
-      if (this.value instanceof Code && (match = this.METHOD_DEF.exec(name))) {
+      if (this.value instanceof Code && (match = METHOD_DEF.exec(name))) {
         this.value.name = match[2];
         if (match[1]) {
           this.value.klass = match[1];
@@ -2258,6 +2257,7 @@
   TAB = '  ';
   IDENTIFIER = /^[$A-Za-z_\x7f-\uffff][$\w\x7f-\uffff]*$/;
   SIMPLENUM = /^[+-]?\d+$/;
+  METHOD_DEF = /^(?:([$A-Za-z_][$\w\x7f-\uffff]*)\.prototype\.)?([$A-Za-z_][$\w\x7f-\uffff]*)$/;
   IS_STRING = /^['"]/;
   utility = function(name) {
     var ref;
diff --git a/src/nodes.coffee b/src/nodes.coffee
index 5dd8299e1b..9ab7d271e5 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -907,9 +907,6 @@ exports.Assign = class Assign extends Base
   constructor: (@variable, @value, @context, options) ->
     @param = options and options.param
 
-  # Matchers for detecting class/method names
-  METHOD_DEF: /^(?:(\S+)\.prototype\.|\S+?)?\b([$A-Za-z_][$\w\x7f-\uffff]*)$/
-
   children: ['variable', 'value']
 
   assigns: (name) ->
@@ -935,7 +932,7 @@ exports.Assign = class Assign extends Base
         o.scope.add name, 'var'
       else
         o.scope.find name
-    if @value instanceof Code and match = @METHOD_DEF.exec name
+    if @value instanceof Code and match = METHOD_DEF.exec name
       @value.name  = match[2]
       @value.klass = match[1] if match[1]
     val = @value.compile o, LEVEL_LIST
@@ -1802,6 +1799,7 @@ TAB = '  '
 
 IDENTIFIER = /^[$A-Za-z_\x7f-\uffff][$\w\x7f-\uffff]*$/
 SIMPLENUM  = /^[+-]?\d+$/
+METHOD_DEF = /^(?:([$A-Za-z_][$\w\x7f-\uffff]*)\.prototype\.)?([$A-Za-z_][$\w\x7f-\uffff]*)$/
 
 # Is a literal value a string?
 IS_STRING = /^['"]/