diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 599d832..970201d 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -173,7 +173,6 @@ static int interrupt_registered;
 static struct hfc_multi *syncmaster;
 static int plxsd_master; /* if we have a master card (yet) */
 static spinlock_t plx_lock; /* may not acquire other lock inside */
-EXPORT_SYMBOL(plx_lock);
 
 #define	TYP_E1		1
 #define	TYP_4S		4