| Index: test/mjsunit/harmony/weakmaps.js | 
| diff --git a/test/mjsunit/harmony/weakmaps.js b/test/mjsunit/harmony/weakmaps.js | 
| index 97f553cf29875e91ab64bdb2d56ea85b016cefc7..e43f9167e641b72ca4e440d211fd85bee367e9a0 100644 | 
| --- a/test/mjsunit/harmony/weakmaps.js | 
| +++ b/test/mjsunit/harmony/weakmaps.js | 
| @@ -137,6 +137,7 @@ assertTrue(WeakMap.prototype.set instanceof Function) | 
| assertTrue(WeakMap.prototype.get instanceof Function) | 
| assertTrue(WeakMap.prototype.has instanceof Function) | 
| assertTrue(WeakMap.prototype.delete instanceof Function) | 
| +assertTrue(WeakMap.prototype.constructor === WeakMap) | 
|  | 
|  | 
| // Regression test for issue 1617: The prototype of the WeakMap constructor | 
|  |