| Index: test/cctest/test-heap.cc
 | 
| diff --git a/test/cctest/test-heap.cc b/test/cctest/test-heap.cc
 | 
| index 9aa839be6c38e131b32da90d3f6af1bfb6f21941..c0bd08af168930c97afd4edefc52a909a7d45ee8 100644
 | 
| --- a/test/cctest/test-heap.cc
 | 
| +++ b/test/cctest/test-heap.cc
 | 
| @@ -199,7 +199,7 @@ TEST(HeapObjects) {
 | 
|  
 | 
|    // nan oddball checks
 | 
|    CHECK(heap->nan_value()->IsNumber());
 | 
| -  CHECK(isnan(heap->nan_value()->Number()));
 | 
| +  CHECK(std::isnan(heap->nan_value()->Number()));
 | 
|  
 | 
|    Handle<String> s = FACTORY->NewStringFromAscii(CStrVector("fisk hest "));
 | 
|    CHECK(s->IsString());
 | 
| 
 |