diff --git a/boot/boot.js b/boot/boot.js
index 56742c89d..acdfa0327 100644
--- a/boot/boot.js
+++ b/boot/boot.js
@@ -84,15 +84,6 @@ $tw.utils.each = function(object,callback) {
 	}
 };
 
-/*
-Pushes a value to an array only when not yet contained.
-*/
-$tw.utils.pushOnce = function(array,value) {
-	if(array.indexOf(value) == -1) {
-		array.push(value);
-	}
-}
-
 /*
 Helper for making DOM elements
 tag: tag name
diff --git a/core/modules/filters/each.js b/core/modules/filters/each.js
index cd7584323..c60447446 100644
--- a/core/modules/filters/each.js
+++ b/core/modules/filters/each.js
@@ -29,14 +29,17 @@ exports.each = function(source,operator,options) {
 					results.push(title);
 				}
 			}
-		});		
+		});
 	} else {
 		source(function(tiddler,title) {
 			if(tiddler) {
 				$tw.utils.each(
 					options.wiki.getTiddlerList(title,field),
 					function(value) {
-						$tw.utils.pushOnce(results,value);
+						if(!$tw.utils.hop(values,value)) {
+							values[value] = true;
+							results.push(value);
+						}
 					}
 				);
 			}