diff --git a/src/hotspot/share/runtime/mutexLocker.hpp b/src/hotspot/share/runtime/mutexLocker.hpp
index 9de4093..1bf43ac 100644
--- a/src/hotspot/share/runtime/mutexLocker.hpp
+++ b/src/hotspot/share/runtime/mutexLocker.hpp
@@ -200,9 +200,11 @@ class MutexLocker: StackObj {
 // for debugging: check that we're already owning this lock (or are at a safepoint)
 #ifdef ASSERT
 void assert_locked_or_safepoint(const Monitor * lock);
+void assert_locked_or_safepoint_weak(const Monitor * lock);
 void assert_lock_strong(const Monitor * lock);
 #else
 #define assert_locked_or_safepoint(lock)
+#define assert_locked_or_safepoint_weak(lock)
 #define assert_lock_strong(lock)
 #endif