diff --git a/kal/cmsis/cmsis_liteos2.c b/kal/cmsis/cmsis_liteos2.c
index c37552a8..6262d331 100755
--- a/kal/cmsis/cmsis_liteos2.c
+++ b/kal/cmsis/cmsis_liteos2.c
@@ -891,7 +891,7 @@ uint32_t osEventFlagsGet(osEventFlagsId_t ef_id)
     uint32_t rflags;
 
     if (pstEventCB == NULL) {
-        return (uint32_t)osFlagsErrorParameter;
+        return 0;
     }
 
     uwIntSave = LOS_IntLock();