diff --git a/mediaPlayer/player_msg_control.cpp b/mediaPlayer/player_msg_control.cpp
index 5eeca91d7..cbb53ecac 100644
--- a/mediaPlayer/player_msg_control.cpp
+++ b/mediaPlayer/player_msg_control.cpp
@@ -180,6 +180,7 @@ namespace Cicada {
 
     bool PlayerMessageControl::empty()
     {
+        ADD_LOCK;
         return mMsgQueue.empty();
     }