diff --git a/cp/ps/driver/inc/misc/drvs_voiceprocess.h b/cp/ps/driver/inc/misc/drvs_voiceprocess.h
index 3b6795f..db2104e 100755
--- a/cp/ps/driver/inc/misc/drvs_voiceprocess.h
+++ b/cp/ps/driver/inc/misc/drvs_voiceprocess.h
@@ -245,7 +245,8 @@
     UINT32 sample_rate;//20
     UINT8 useDtmfLoop;//21
     SINT32 muteCount;//22 mute_count
-	BOOL rxMuteEn; //23
+    BOOL vpLoopBkRunning;//23 
+	BOOL rxMuteEn; //24
 } T_zDrvVoice_GbVar; //T_zDrvVoice_GbVar
 
 typedef struct