diff --git a/lib/queue.c b/lib/queue.c
index 0762fb9..8ab08f9 100644
--- a/lib/queue.c
+++ b/lib/queue.c
@@ -272,7 +272,8 @@ static void *__poll_thread(void *poll)
     }
 
     if(resched) { /* ok now we need to resched and descrease/increase thread poll volume */
-      mdrate = ((DQTPOLL_DELTASE*1000000) + DQTPOLL_DELTAMS)/p->msgop;
+      if(p->msgop) mdrate = ((DQTPOLL_DELTASE*1000000) + DQTPOLL_DELTAMS)/p->msgop;
+      else mdrate = 0;
       if((mdrate > p->poll_value) && (p->poll_value < MAX_POLL_VALUE)) { /* increase ! */
         if((npoll = malloc(sizeof(struct __pthrd_data)))) {
           npoll->myid = idx_allocate(p->idx);