Index: test/mjsunit/mjsunit.js |
diff --git a/test/mjsunit/mjsunit.js b/test/mjsunit/mjsunit.js |
index 65fb301b440ead7c7db977059beb9d3088f0519b..25d7c004326ce3df03ebe83edb2f0becd5336bba 100644 |
--- a/test/mjsunit/mjsunit.js |
+++ b/test/mjsunit/mjsunit.js |
@@ -321,7 +321,7 @@ var assertUnreachable; |
assertInstanceof = function assertInstanceof(obj, type) { |
if (!(obj instanceof type)) { |
var actualTypeName = null; |
- var actualConstructor = Object.prototypeOf(obj).constructor; |
+ var actualConstructor = Object.getPrototypeOf(obj).constructor; |
if (typeof actualConstructor == "function") { |
actualTypeName = actualConstructor.name || String(actualConstructor); |
} |