diff --git a/runtime/base/mutex.h b/runtime/base/mutex.h
index dea52a6..b924798 100644
--- a/runtime/base/mutex.h
+++ b/runtime/base/mutex.h
@@ -53,7 +53,7 @@
 class ScopedContentionRecorder;
 class Thread;
 
-const bool kDebugLocking = kIsDebugBuild;
+const bool kDebugLocking = true || kIsDebugBuild;
 
 // Base class for all Mutex implementations
 class BaseMutex {