diff --git a/drivers/isdn/hisax/elsa.c b/drivers/isdn/hisax/elsa.c
index 2b2677ba0230..d272d8ce6537 100644
--- a/drivers/isdn/hisax/elsa.c
+++ b/drivers/isdn/hisax/elsa.c
@@ -883,7 +883,7 @@ setup_elsa_isa(struct IsdnCard *card)
 	val += 'A' - 3;
 	if (val == 'B' || val == 'C')
 		val ^= 1;
-	if ((cs->subtyp == ELSA_PCFPRO) && (val = 'G'))
+	if ((cs->subtyp == ELSA_PCFPRO) && (val == 'G'))
 		val = 'C';
 	printk(KERN_INFO
 	       "Elsa: %s found at %#lx Rev.:%c IRQ %d\n",