diff --git a/mozilla/js/src/xpconnect/src/xpcwrappednative.cpp b/mozilla/js/src/xpconnect/src/xpcwrappednative.cpp
index f68a55ee30a..c6f269a4794 100644
--- a/mozilla/js/src/xpconnect/src/xpcwrappednative.cpp
+++ b/mozilla/js/src/xpconnect/src/xpcwrappednative.cpp
@@ -642,7 +642,6 @@ XPCWrappedNative::~XPCWrappedNative()
     }
 
     Native2WrappedNativeMap* map = GetScope()->GetWrappedNativeMap();
-    WrappedNative2WrapperMap* wn2wmmap = GetScope()->GetWrapperMap();
     {   // scoped lock
         XPCAutoLock lock(GetRuntime()->GetMapLock());
         map->Remove(this);