diff --git a/drivers/isdn/sc/card.h b/drivers/isdn/sc/card.h
index 5992f63c383e..0120bcf88311 100644
--- a/drivers/isdn/sc/card.h
+++ b/drivers/isdn/sc/card.h
@@ -109,7 +109,7 @@ void memcpy_fromshmem(int card, void *dest, const void *src, size_t n);
 int get_card_from_id(int driver);
 int indicate_status(int card, int event, ulong Channel, char *Data);
 irqreturn_t interrupt_handler(int interrupt, void *cardptr);
-int sndpkt(int devId, int channel, struct sk_buff *data);
+int sndpkt(int devId, int channel, int ack, struct sk_buff *data);
 void rcvpkt(int card, RspMessage *rcvmsg);
 int command(isdn_ctrl *cmd);
 int reset(int card);
diff --git a/drivers/isdn/sc/packet.c b/drivers/isdn/sc/packet.c
index 92016a2608e9..5ff6ae868440 100644
--- a/drivers/isdn/sc/packet.c
+++ b/drivers/isdn/sc/packet.c
@@ -20,7 +20,7 @@
 #include "message.h"
 #include "card.h"
 
-int sndpkt(int devId, int channel, struct sk_buff *data)
+int sndpkt(int devId, int channel, int ack, struct sk_buff *data)
 {
 	LLData	ReqLnkWrite;
 	int status;