1 files changed, 1 insertions, 1 deletions
diff --git a/lib/scope.js b/lib/scope.js
index 833a96ef..3165186b 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -291,7 +291,7 @@ AST_Scope.DEFMETHOD("next_mangled", function(){
         // inner scopes.
         for (var i = n; --i >= 0;) {
             var sym = ext[i];
-            var name = sym.mangled_name || sym.name;
+            var name = sym.mangled_name || (sym.unmangleable() && sym.name);
             if (m == name) continue out;
         }
         return m;