--- a/js/src/jsops.cpp
+++ b/js/src/jsops.cpp
@@ -3252,17 +3252,17 @@ BEGIN_CASE(JSOP_LAMBDA)
     LOAD_FUNCTION(0);
     obj = FUN_OBJECT(fun);
 
     /* do-while(0) so we can break instead of using a goto. */
     do {
         if (FUN_NULL_CLOSURE(fun)) {
             parent = fp->scopeChain;
 
-            if (0 && OBJ_GET_PARENT(cx, obj) == parent) {
+            if (OBJ_GET_PARENT(cx, obj) == parent) {
                 op = JSOp(regs.pc[JSOP_LAMBDA_LENGTH]);
 
                 /*
                  * Optimize ({method: function () { ... }, ...}) and
                  * this.method = function () { ... }; bytecode sequences.
                  */
                 if (op == JSOP_SETMETHOD) {
 #ifdef DEBUG