1 files changed, 2 insertions, 1 deletions
diff --git a/deps/v8/src/base/platform/mutex.h b/deps/v8/src/base/platform/mutex.h
index 5b3b31ec1e5..c3144f7ceb5 100644
--- a/deps/v8/src/base/platform/mutex.h
+++ b/deps/v8/src/base/platform/mutex.h
@@ -67,7 +67,8 @@ class V8_BASE_EXPORT Mutex final {
     return native_handle_;
   }
 
-  V8_INLINE void AssertHeld() { DCHECK_EQ(1, level_); }
+  V8_INLINE void AssertHeld() const { DCHECK_EQ(1, level_); }
+  V8_INLINE void AssertUnheld() const { DCHECK_EQ(0, level_); }
 
  private:
   NativeHandle native_handle_;