diff --git a/modules/utils.js b/modules/utils.js
index 5c800307..36b4d1e2 100644
--- a/modules/utils.js
+++ b/modules/utils.js
@@ -671,7 +671,7 @@ var TreeStyleTabUtils = {
 	getTabFromChild : function TSTUtils_getTabFromChild(aTab) 
 	{
 		return this.evaluateXPath(
-				'ancestor-or-self::xul:tab[ancestor::xul:tabbrowser]',
+				'ancestor-or-self::xul:tab',
 				aTab,
 				Ci.nsIDOMXPathResult.FIRST_ORDERED_NODE_TYPE
 			).singleNodeValue;