diff --git a/lib/class.js b/lib/class.js
index 10c19be..96672b6 100644
--- a/lib/class.js
+++ b/lib/class.js
@@ -56,6 +56,9 @@ exports.implements = function()
     for ( var i = 0; i < len; i++ )
     {
         arg = arguments[ i ];
+
+        // copy all interface methods to the class (does not yet deep copy)
+        util.propCopy( arg.prototype, dest.prototype );
         dest.implemented.push( arg );
     }
 
diff --git a/test/test-class-implements.js b/test/test-class-implements.js
index 7599e22..9fd605b 100644
--- a/test/test-class-implements.js
+++ b/test/test-class-implements.js
@@ -63,3 +63,10 @@ assert.ok(
     "Class contains list of implemented interfaces"
 );
 
+assert.ok(
+    ( ( Foo.prototype.foo instanceof Function )
+        && ( Foo.prototype.foo2 instanceof Function )
+    ),
+    "Abstract methods are copied into the new class prototype"
+);
+