diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index 24cc84ef..6dbfba1a 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -71,7 +71,7 @@ extern HANDLE hProc;
 #define MMNIF_RX_BUFFERLEN		1792
 #define MMNIF_TX_BUFFERLEN		1792
 
-#define MMNIF_CORES				2
+#define MMNIF_CORES			2
 
 #define MMNIF_WORKER_BUDGET		4
 
@@ -517,6 +517,7 @@ void* mmnif_retrigger(void* e)
     while(active)
     {
         sleep(1);
+        DEBUGPRINTF("mmnif_retrigger(): \n");
         mmnif_irqhandler();
     }
     return NULL;
@@ -1178,7 +1179,10 @@ static int mmnif_wait(struct netif* netif, uint32_t poll, int budget)
 		{
 			/* if there is no data return immeadieatly */
 			if (mailbox_ptr_tryfetch(&(mmnif->mbox), (void**) &p))
-				return err;
+                        {
+                            DEBUGPRINTF("mmnif_wait(): fetched empty mailbox\n");
+                            return err;
+                        }
 		}
 		else 
 		{