diff --git a/lib/scope.js b/lib/scope.js
index 605cf3bb..deeb8092 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -546,10 +546,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
         var mangle_with_block_scope =
             (!options.ie8 && node instanceof AST_SymbolCatch) ||
             node instanceof AST_SymbolBlockDeclaration;
-        if (options.reserved.indexOf(node.name) >= 0) {
-            mangle_with_block_scope = false;
-        }
-        if (mangle_with_block_scope) {
+        if (mangle_with_block_scope && options.reserved.indexOf(node.name) < 0) {
             to_mangle.push(node.definition());
             return;
         }
diff --git a/test/compress/harmony.js b/test/compress/harmony.js
index b5971466..6accd8b5 100644
--- a/test/compress/harmony.js
+++ b/test/compress/harmony.js
@@ -819,6 +819,10 @@ class_name_can_be_preserved_with_reserved: {
         }
     }
     expect: {
-        function x(){class Foo{}Foo.bar;class s{}s.foo}
+        function x(){
+            class Foo{}
+            Foo.bar;
+            class s{}s.foo
+        }
     }
 }
\ No newline at end of file