diff --git a/base.js b/base.js
index d623d78..caa84fc 100644
--- a/base.js
+++ b/base.js
@@ -384,8 +384,10 @@ define(["dojo"], function(dojo){
 		//
 		scope = scope || d.global;
 		for(var key in obj){
-			// FIXME: i feel like these are backwards? should it be function(key, value) ?
-			callback.call(scope, obj[key], key, obj);
+			if(obj.hasOwnProperty(key) {
+				// FIXME: i feel like these are backwards? should it be function(key, value) ?
+				callback.call(scope, obj[key], key, obj);
+			}
 		}
 	}