diff --git a/mozilla/extensions/transformiix/source/xslt/functions/SystemPropertyFunctionCall.cpp b/mozilla/extensions/transformiix/source/xslt/functions/SystemPropertyFunctionCall.cpp
index d64fed54333..db6ed23c9b8 100644
--- a/mozilla/extensions/transformiix/source/xslt/functions/SystemPropertyFunctionCall.cpp
+++ b/mozilla/extensions/transformiix/source/xslt/functions/SystemPropertyFunctionCall.cpp
@@ -39,7 +39,7 @@ ExprResult* SystemPropertyFunctionCall::evaluate(Node* context, ContextState* cs
             exprResult->stringValue(property);
             if (XMLUtils::isValidQName(property)) {
                 String propertyNsURI, prefix;
-                XMLUtils::getLocalPart(property, prefix);
+                XMLUtils::getPrefix(property, prefix);
                 cs->getNameSpaceURIFromPrefix(prefix, propertyNsURI);
                 if (propertyNsURI.isEqual(XSLT_NS)) {
                     String localName;