diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 7142204293b0..510947b1fee4 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -4817,8 +4817,9 @@ static void qeth_determine_capabilities(struct qeth_card *card)
 		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 
 	QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
-	QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac1);
-	QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac3);
+	QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
+	QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
+	QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
 	QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
 	if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
 	    ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||