diff --git a/drivers/isdn/hardware/mISDN/udevice.c b/drivers/isdn/hardware/mISDN/udevice.c
index 3e730ee..7a8f0d5 100644
--- a/drivers/isdn/hardware/mISDN/udevice.c
+++ b/drivers/isdn/hardware/mISDN/udevice.c
@@ -1509,7 +1509,7 @@ free_device(mISDNdevice_t *dev)
 	list_del(&dev->list);
 	write_unlock_irqrestore(&mISDN_device_lock, flags);
 	if (!list_empty(&dev->entitylist)) {
-		printk(KERN_WARNING "MISDN %s: entitylist not empty\n", __FUNCTION__);
+		if (device_debug ) printk(KERN_WARNING "MISDN %s: entitylist not empty\n", __FUNCTION__);
 		list_for_each_safe(item, ni, &dev->entitylist) {
 			struct entity_item *ei = list_entry(item, struct entity_item, head);
 			list_del(item);
@@ -1918,7 +1918,8 @@ udev_manager(void *data, u_int prim, void *arg) {
 			break;
 	}
 	if (err) {
-		printk(KERN_WARNING "dev_manager prim %x without device layer\n", prim);
+		if (device_debug) 
+			printk(KERN_WARNING "dev_manager prim %x without device layer\n", prim);
 		goto out;
 	}
 	switch(prim) {
@@ -1950,7 +1951,7 @@ udev_manager(void *data, u_int prim, void *arg) {
 		err = 0;
 	    	break;
 	    default:
-		printk(KERN_WARNING "dev_manager prim %x not handled\n", prim);
+		if (device_debug) printk(KERN_WARNING "dev_manager prim %x not handled\n", prim);
 		err = -EINVAL;
 		break;
 	}