diff --git a/src/lib/bind/accessors.html b/src/lib/bind/accessors.html
index 3ce381c7c2..04de6c3a7e 100644
--- a/src/lib/bind/accessors.html
+++ b/src/lib/bind/accessors.html
@@ -80,7 +80,7 @@
 
       _effectEffects: function(property, value, effects, old, fromAbove) {
         for (var i=0, l=effects.length, fx; (i<l) && (fx=effects[i]); i++) {
-          var fn = fx.fn;
+          var fn = fx.fn || Polymer.Bind['_' + fx.kind + 'Effect'];
           if (fn) {
             fn.call(this, property, value, fx.effect, old, fromAbove);
           }