diff --git a/services/audioflinger/Effects.cpp b/services/audioflinger/Effects.cpp
index 22733a6..aab076c 100644
--- a/services/audioflinger/Effects.cpp
+++ b/services/audioflinger/Effects.cpp
@@ -1883,7 +1883,7 @@
         }
         mCblkMemory.clear();    // free the shared memory before releasing the heap it belongs to
         // Client destructor must run with AudioFlinger client mutex locked
-        Mutex::Autolock _l2(mClient->afClientCallback()->clientMutex());
+        audio_utils::lock_guard _l2(mClient->afClientCallback()->clientMutex());
         mClient.clear();
     }
 }