diff --git a/lib/util.js b/lib/util.js
index 6bbd593..eb6b3b2 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -206,6 +206,17 @@ exports.propCopy = function( props, dest, result_data )
 
     // default functionality
     var actions = {
+        each: function( name, value )
+        {
+            // methods can only be overridden with methods
+            if ( ( dest[ name ] instanceof Function )
+                && ( !( value instanceof Function ) )
+            )
+            {
+                throw new TypeError( "Cannot override method with non-method" );
+            }
+        },
+
         property: function( name, value )
         {
             dest[ name ] = value;
@@ -338,12 +349,6 @@ function method_override(
     super_method, new_method, name, abstract_map, abstract_methods, data
 )
 {
-    // ensure we're overriding the method with another method
-    if ( !( new_method instanceof Function ) )
-    {
-        throw new TypeError( "Cannot override method with non-method" );
-    }
-
     if ( abstract_map[ name ] !== undefined )
     {
         var is_abstract = exports.isAbstractMethod( new_method );