diff --git a/src/libopensc/card-gpk.c b/src/libopensc/card-gpk.c
index 03ca693e..2d602788 100644
--- a/src/libopensc/card-gpk.c
+++ b/src/libopensc/card-gpk.c
@@ -1685,7 +1685,6 @@ gpk_card_ctl(struct sc_card *card, unsigned long cmd, void *ptr)
 		*(int *) ptr = DRVDATA(card)->locked;
 		return 0;
 	}
-	error(card->ctx, "card_ctl command %u not supported\n", cmd);
 	return SC_ERROR_NOT_SUPPORTED;
 }
 
diff --git a/src/libopensc/card.c b/src/libopensc/card.c
index 6d535805..2ed532ad 100644
--- a/src/libopensc/card.c
+++ b/src/libopensc/card.c
@@ -745,13 +745,18 @@ inline int sc_card_valid(const struct sc_card *card) {
 int
 sc_card_ctl(struct sc_card *card, unsigned long cmd, void *args)
 {
-	int r;
+	int r = SC_ERROR_NOT_SUPPORTED;
 
 	assert(card != NULL);
 	SC_FUNC_CALLED(card->ctx, 2);
-        if (card->ops->card_ctl == NULL)
-		SC_FUNC_RETURN(card->ctx, 2, SC_ERROR_NOT_SUPPORTED);
-	r = card->ops->card_ctl(card, cmd, args);
+        if (card->ops->card_ctl != NULL)
+		r = card->ops->card_ctl(card, cmd, args);
+
+	/* suppress "not supported" error messages */
+	if (r == SC_ERROR_NOT_SUPPORTED) {
+		debug(card->ctx, "card_ctl(%lu) not supported\n", cmd);
+		return r;
+	}
         SC_FUNC_RETURN(card->ctx, 2, r);
 }