diff --git a/src/W800_SDK_v1.00.10/src/bt/blehost/porting/w800/include/nimble/nimble_npl_os.h b/src/W800_SDK_v1.00.10/src/bt/blehost/porting/w800/include/nimble/nimble_npl_os.h
index 3aa9c7d..f2fc5e6 100644
--- a/src/W800_SDK_v1.00.10/src/bt/blehost/porting/w800/include/nimble/nimble_npl_os.h
+++ b/src/W800_SDK_v1.00.10/src/bt/blehost/porting/w800/include/nimble/nimble_npl_os.h
@@ -96,6 +96,7 @@ ble_npl_eventq_deinit(struct ble_npl_eventq *evq)
 {
     if(evq && evq->q) {
         tls_os_queue_delete(evq->q);
+        evq->q = NULL;
     }
 }