diff --git a/src/W800_SDK_v1.00.10/src/bt/blehost/porting/w800/src/npl_os_freertos.c b/src/W800_SDK_v1.00.10/src/bt/blehost/porting/w800/src/npl_os_freertos.c
index 2a25be1..2263be2 100644
--- a/src/W800_SDK_v1.00.10/src/bt/blehost/porting/w800/src/npl_os_freertos.c
+++ b/src/W800_SDK_v1.00.10/src/bt/blehost/porting/w800/src/npl_os_freertos.c
@@ -248,8 +248,12 @@ os_callout_timer_cb(void *ptmr, void *parg)
     struct ble_npl_callout *co;
     co = (struct ble_npl_callout *)parg;
 
-    if(co->evq) {
-        ble_npl_eventq_put(co->evq, &co->ev);
+    if(co->evq)
+    {
+        /* In some cases, the event queue g_eventq_dflt is already
+           deleted when this callback is called raising an issue ! */
+        if(co->evq->q)
+            ble_npl_eventq_put(co->evq, &co->ev);
     } else {
         co->ev.fn(&co->ev);
     }