diff --git a/drivers/isdn/hardware/avm/c4.c b/drivers/isdn/hardware/avm/c4.c
index 2a3eb38..6f5efa8d 100644
--- a/drivers/isdn/hardware/avm/c4.c
+++ b/drivers/isdn/hardware/avm/c4.c
@@ -28,8 +28,8 @@
 #include <linux/isdn/capilli.h>
 #include "avmcard.h"
 
-#undef CONFIG_C4_DEBUG
-#undef CONFIG_C4_POLLDEBUG
+#undef AVM_C4_DEBUG
+#undef AVM_C4_POLLDEBUG
 
 /* ------------------------------------------------------------- */
 
@@ -420,7 +420,7 @@
 
 	skb = skb_dequeue(&dma->send_queue);
 	if (!skb) {
-#ifdef CONFIG_C4_DEBUG
+#ifdef AVM_C4_DEBUG
 		printk(KERN_DEBUG "%s: tx underrun\n", card->name);
 #endif
 		return;
@@ -444,16 +444,16 @@
 			_put_slice(&p, skb->data, len);
 		}
 		txlen = (u8 *)p - (u8 *)dma->sendbuf.dmabuf;
-#ifdef CONFIG_C4_DEBUG
+#ifdef AVM_C4_DEBUG
 		printk(KERN_DEBUG "%s: tx put msg len=%d\n", card->name, txlen);
 #endif
 	} else {
 		txlen = skb->len-2;
-#ifdef CONFIG_C4_POLLDEBUG
+#ifdef AVM_C4_POLLDEBUG
 		if (skb->data[2] == SEND_POLLACK)
 			printk(KERN_INFO "%s: ack to c4\n", card->name);
 #endif
-#ifdef CONFIG_C4_DEBUG
+#ifdef AVM_C4_DEBUG
 		printk(KERN_DEBUG "%s: tx put 0x%x len=%d\n",
 				card->name, skb->data[2], txlen);
 #endif
@@ -508,7 +508,7 @@
 	u32 cidx;
 
 
-#ifdef CONFIG_C4_DEBUG
+#ifdef AVM_C4_DEBUG
 	printk(KERN_DEBUG "%s: rx 0x%x len=%lu\n", card->name,
 				b1cmd, (unsigned long)dma->recvlen);
 #endif
@@ -586,7 +586,7 @@
 		break;
 
 	case RECEIVE_START:
-#ifdef CONFIG_C4_POLLDEBUG
+#ifdef AVM_C4_POLLDEBUG
 		printk(KERN_INFO "%s: poll from c4\n", card->name);
 #endif
 		if (!suppress_pollack)