diff --git a/src/libopensc/pkcs15.c b/src/libopensc/pkcs15.c
index ba9d6125..f7c49ef2 100644
--- a/src/libopensc/pkcs15.c
+++ b/src/libopensc/pkcs15.c
@@ -424,8 +424,9 @@ fix_starcos_pkcs15_card(struct sc_pkcs15_card *p15card)
 	if (strcmp(p15card->card->driver->short_name,"cardos") == 0) {
 
 		/* D-Trust cards (D-TRUST, D-SIGN) */
-		if (strstr(p15card->tokeninfo->label,"D-TRUST") != NULL
-			|| strstr(p15card->tokeninfo->label,"D-SIGN") != NULL) {
+		if (p15card->tokeninfo->label
+				&& (strstr(p15card->tokeninfo->label,"D-TRUST") != NULL
+					|| strstr(p15card->tokeninfo->label,"D-SIGN") != NULL)) {
 
 			/* D-TRUST Card 2.0 2cc (standard cards, which always add
 			 * SHA1 prefix itself */