diff --git a/kernel/base/ipc/los_mux.c b/kernel/base/ipc/los_mux.c
index fa4a67b81bbd3529ac2802dce7075d1af6217809..bd032b14dd187e88c682cc95416cf68c472d4050 100644
--- a/kernel/base/ipc/los_mux.c
+++ b/kernel/base/ipc/los_mux.c
@@ -309,7 +309,13 @@ STATIC UINT32 OsMuxPendOp(LosTaskCB *runTask, LosMux *mutex, UINT32 timeout)
     }
 
     if (((LosTaskCB *)mutex->owner == runTask) && (mutex->attr.type == LOS_MUX_RECURSIVE)) {
-        mutex->muxCount++;
+        if(mutex->muxCount!=65535){
+            mutex->muxCount++;
+        } else {
+        return LOS_EINVAL;
+        }
+    }
+        
         return LOS_OK;
     }