diff --git a/src/eap_peer/eap_wsc.c b/src/eap_peer/eap_wsc.c
index d007a5708..f3581560e 100644
--- a/src/eap_peer/eap_wsc.c
+++ b/src/eap_peer/eap_wsc.c
@@ -194,7 +194,8 @@ static void * eap_wsc_init(struct eap_sm *sm)
 			cfg.pin = dev_pw;
 			cfg.pin_len /= 2;
 		}
-		if (cfg.pin_len == 6 && os_strncmp(pos, "nfc-pw", 6) == 0) {
+		if (cfg.pin_len == 6 &&
+		    os_strncmp((const char *) cfg.pin, "nfc-pw", 6) == 0) {
 			cfg.pin = NULL;
 			cfg.pin_len = 0;
 			nfc = 1;