diff --git a/src/heap_bitmap.cc b/src/heap_bitmap.cc
index c7b2f6c..7d81a5d 100644
--- a/src/heap_bitmap.cc
+++ b/src/heap_bitmap.cc
@@ -1,2 +1,16 @@
 #include "heap_bitmap.h"
 
+namespace art {
+
+void HeapBitmap::ReplaceBitmap(SpaceBitmap* old_bitmap, SpaceBitmap* new_bitmap) {
+  // TODO: C++0x auto
+  for (Bitmaps::iterator cur  = bitmaps_.begin(); cur != bitmaps_.end(); ++cur) {
+    if (*cur == old_bitmap) {
+      *cur = new_bitmap;
+      return;
+    }
+  }
+  LOG(FATAL) << "bitmap " << static_cast<const void*>(old_bitmap) << " not found";
+}
+
+}  // namespace art