diff --git a/drivers/isdn/hisax/icc.c b/drivers/isdn/hisax/icc.c
index dcf31f8..b4ca585 100644
--- a/drivers/isdn/hisax/icc.c
+++ b/drivers/isdn/hisax/icc.c
@@ -108,7 +108,7 @@
 #endif
 }
 
-void
+static void
 icc_empty_fifo(struct IsdnCardState *cs, int count)
 {
 	u_char *ptr;
@@ -563,13 +563,13 @@
 	}
 }
 
-void
+static void
 setstack_icc(struct PStack *st, struct IsdnCardState *cs)
 {
 	st->l1.l1hw = ICC_l1hw;
 }
 
-void 
+static void
 DC_Close_icc(struct IsdnCardState *cs) {
 	if (cs->dc.icc.mon_rx) {
 		kfree(cs->dc.icc.mon_rx);