diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index 99cfb70f..545130ec 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -1182,6 +1182,8 @@ void mmnif_irqhandler()
 	
 	mmnif = (mmnif_t*) mmnif_dev->state;
 
+DEBUGPRINTF("mmnif_irqhandler(): hander called");
+
 	while (mmnif->rx_buff->queued)
 		mmnif_rx(mmnif_dev);
 }