diff --git a/mcfw/interfaces/link_api/avsync_internal.h b/mcfw/interfaces/link_api/avsync_internal.h
index a6933a3..ba4bec9 100755
--- a/mcfw/interfaces/link_api/avsync_internal.h
+++ b/mcfw/interfaces/link_api/avsync_internal.h
@@ -112,8 +112,10 @@ typedef struct  Avsync_PlayerTimeObj
 typedef struct Avsync_WallTimerObj
 {
     UInt64 curWallTime;
+    UInt64 nextWallTime;
     UInt32 lastSTC;
     UInt32 rollOverCount;
+    UInt32 updateWallTimeFlag;
 } Avsync_WallTimerObj;
 
 typedef struct Avsync_SimpleMovingAvgObj
diff --git a/mcfw/src_bios6/links_m3vpss/avsync/avsync_m3vpss.c b/mcfw/src_bios6/links_m3vpss/avsync/avsync_m3vpss.c
index d8f1426..1bf2986 100755
--- a/mcfw/src_bios6/links_m3vpss/avsync/avsync_m3vpss.c
+++ b/mcfw/src_bios6/links_m3vpss/avsync/avsync_m3vpss.c
@@ -70,6 +70,13 @@ static Void avsync_update_wall_timer(UArg arg)
     Avsync_WallTimerObj *pWallTimerObj = (Avsync_WallTimerObj *)arg;
     UInt32 curSTC = AVSYNC_GET_HW_TIME();
 
+    if (pWallTimerObj->updateWallTimeFlag)
+    {
+        AVSYNC_CRITICAL_BEGIN();
+        pWallTimerObj->curWallTime = pWallTimerObj->nextWallTime;
+        pWallTimerObj->updateWallTimeFlag = FALSE;
+        AVSYNC_CRITICAL_END();
+    }
     if (curSTC < pWallTimerObj->lastSTC)
     {
 
diff --git a/mcfw/src_linux/links/avsync/avsync.c b/mcfw/src_linux/links/avsync/avsync.c
index 3e2da06..94d0b35 100755
--- a/mcfw/src_linux/links/avsync/avsync.c
+++ b/mcfw/src_linux/links/avsync/avsync.c
@@ -1806,7 +1806,12 @@ Int32 Avsync_setWallTimeBase(UInt64 wallTimeBase)
     }
     else
     {
+        pObj->wallTimeBase = wallTimeBase;
+        AVSYNC_CRITICAL_BEGIN();
+        pObj->srObj->wallTimer.nextWallTime = wallTimeBase;
+        pObj->srObj->wallTimer.updateWallTimeFlag = TRUE;
         status = AVSYNC_E_INVALIDPARAMS;
+        AVSYNC_CRITICAL_END();
     }
     return status;
 }