diff --git a/src/tilemap/Tilemap.js b/src/tilemap/Tilemap.js
index 7f775a71..ad5e2f81 100644
--- a/src/tilemap/Tilemap.js
+++ b/src/tilemap/Tilemap.js
@@ -400,7 +400,7 @@ Phaser.Tilemap.prototype = {
         //  Collide all of the IDs given in the indexes array
         for (var i = 0, len = indexes.length; i < len; i++)
         {
-            this.setCollisionByIndex(i, layer, false);
+            this.setCollisionByIndex(indexes[i], layer, false);
         }
 
         //  Now re-calculate interesting faces