diff --git a/lib/scope.js b/lib/scope.js
index cd480841..40237b39 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -226,6 +226,7 @@ AST_SymbolRef.DEFMETHOD("reference", function() {
     var s = this.scope;
     while (s) {
         push_uniq(s.enclosed, def);
+        if (s === def.scope) break;
         s = s.parent_scope;
     }
 });