diff --git a/src/debugger.h b/src/debugger.h
index a818a48..85cc1f8 100644
--- a/src/debugger.h
+++ b/src/debugger.h
@@ -257,7 +257,7 @@
   };
   static bool DdmHandleHpsgNhsgChunk(HpsgWhen when, HpsgWhat what, bool native);
 
-  static void DdmSendHeapInfo(HpifWhen reason, bool shouldLock);
+  static void DdmSendHeapInfo(HpifWhen reason);
   static void DdmSendHeapSegments(bool shouldLock, bool native);
 };