diff --git a/src/heap.h b/src/heap.h
index 12350016d2..09be0dbb04 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -23,7 +23,7 @@ class Heap {
   virtual ~Heap() { }
   virtual void collect(CollectionType type, Iterator* it) = 0;
   virtual bool isTenured(void** p) = 0;
-  virtual bool markTenured(void** p);
+  virtual void markTenured(void** p);
 };
 
 #endif//HEAP_H