diff --git a/services/audioflinger/PatchCommandThread.h b/services/audioflinger/PatchCommandThread.h
index b7853f0..b52e0a9 100644
--- a/services/audioflinger/PatchCommandThread.h
+++ b/services/audioflinger/PatchCommandThread.h
@@ -84,7 +84,7 @@
 
     class ReleaseAudioPatchData : public CommandData {
     public:
-        ReleaseAudioPatchData(audio_patch_handle_t handle)
+        explicit ReleaseAudioPatchData(audio_patch_handle_t handle)
             :   mHandle(handle) {}
 
         audio_patch_handle_t mHandle;