diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index fc9c57893f8adae83c5e9dca15084d2fc9530619..7db0a1c3216c7b8dc86703ac23074b9afbe82867 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -903,7 +903,7 @@ static int mkiss_ioctl(struct tty_struct *tty, struct file *file,
 static long mkiss_compat_ioctl(struct tty_struct *tty, struct file *file,
 	unsigned int cmd, unsigned long arg)
 {
-	switch (arg) {
+	switch (cmd) {
 	case SIOCGIFNAME:
 	case SIOCGIFENCAP:
 	case SIOCSIFENCAP: