diff --git a/lib/OpenLayers/Layer/Grid.js b/lib/OpenLayers/Layer/Grid.js
index 0b8e347551..92a41695d3 100644
--- a/lib/OpenLayers/Layer/Grid.js
+++ b/lib/OpenLayers/Layer/Grid.js
@@ -199,7 +199,7 @@ OpenLayers.Layer.Grid.prototype = Object.extend( new OpenLayers.Layer(), {
         
         // concat tile params with layer params and convert to string
         var allParams = Object.extend(params, this.params);
-        var paramsString = OpenLayers.getParameterString(allParams);
+        var paramsString = OpenLayers.Util.getParameterString(allParams);
 
         var server = this.url;
         var lastServerChar = server.charAt(server.length - 1);
diff --git a/tests/test_Util.html b/tests/test_Util.html
index 8450253749..bd841455fb 100644
--- a/tests/test_Util.html
+++ b/tests/test_Util.html
@@ -28,7 +28,7 @@
         t.plan( 1 );
 
         var div = 
-        t.eq( OpenLayers.getParameterString(params), "foo=bar&chicken=1.5", "getParameterString returns correctly");    
+        t.eq( OpenLayers.Util.getParameterString(params), "foo=bar&chicken=1.5", "getParameterString returns correctly");    
     }
 
     function test_01_Util_createImage(t) {
@@ -45,7 +45,7 @@
                        chicken: 1.5
                      }
 
-        t.eq( OpenLayers.getParameterString(params), "foo=bar&chicken=1.5", "getParameterString returns correctly");    
+        t.eq( OpenLayers.Util.getParameterString(params), "foo=bar&chicken=1.5", "getParameterString returns correctly");    
     }