diff --git a/mozilla/extensions/transformiix/source/xml/dom/standalone/NodeDefinition.cpp b/mozilla/extensions/transformiix/source/xml/dom/standalone/NodeDefinition.cpp
index e4de2448539..17af61bf4e9 100644
--- a/mozilla/extensions/transformiix/source/xml/dom/standalone/NodeDefinition.cpp
+++ b/mozilla/extensions/transformiix/source/xml/dom/standalone/NodeDefinition.cpp
@@ -369,7 +369,7 @@ nsresult NodeDefinition::getBaseURI(nsAString& aURI)
       default:
         break;
     }
-    node = node->getParentNode();
+    node = node->getXPathParent();
   }
 
   PRInt32 count = baseUrls.Count();