diff --git a/ChatSDKCore/Classes/Defines/BKeys.h b/ChatSDKCore/Classes/Defines/BKeys.h
index a6a5f9ef..dab6bc9f 100755
--- a/ChatSDKCore/Classes/Defines/BKeys.h
+++ b/ChatSDKCore/Classes/Defines/BKeys.h
@@ -31,7 +31,7 @@
 #define bDate @"date"
 #define bUserFirebaseID @"user-firebase-id"
 #define bFrom @"from"
-#define bTo @"to"
+//#define bTo @"to"
 
 #define bMute @"mute"
 #define bUnmute @"unmute"