diff --git a/utils/osmo-auc-gen.c b/utils/osmo-auc-gen.c
index b026e2831..3b3e5577b 100644
--- a/utils/osmo-auc-gen.c
+++ b/utils/osmo-auc-gen.c
@@ -48,18 +48,18 @@ static void dump_triplets_dat(struct osmo_auth_vector *vec)
 
 static void dump_auth_vec(struct osmo_auth_vector *vec)
 {
-	printf("RAND:\t%s\n", osmo_hexdump(vec->rand, sizeof(vec->rand)));
+	printf("RAND:\t%s\n", osmo_hexdump_nospc(vec->rand, sizeof(vec->rand)));
 
 	if (vec->auth_types & OSMO_AUTH_TYPE_UMTS) {
-		printf("AUTN:\t%s\n", osmo_hexdump(vec->autn, sizeof(vec->autn)));
-		printf("IK:\t%s\n", osmo_hexdump(vec->ik, sizeof(vec->ik)));
-		printf("CK:\t%s\n", osmo_hexdump(vec->ck, sizeof(vec->ck)));
-		printf("RES:\t%s\n", osmo_hexdump(vec->res, vec->res_len));
+		printf("AUTN:\t%s\n", osmo_hexdump_nospc(vec->autn, sizeof(vec->autn)));
+		printf("IK:\t%s\n", osmo_hexdump_nospc(vec->ik, sizeof(vec->ik)));
+		printf("CK:\t%s\n", osmo_hexdump_nospc(vec->ck, sizeof(vec->ck)));
+		printf("RES:\t%s\n", osmo_hexdump_nospc(vec->res, vec->res_len));
 	}
 
 	if (vec->auth_types & OSMO_AUTH_TYPE_GSM) {
-		printf("SRES:\t%s\n", osmo_hexdump(vec->sres, sizeof(vec->sres)));
-		printf("Kc:\t%s\n", osmo_hexdump(vec->kc, sizeof(vec->kc)));
+		printf("SRES:\t%s\n", osmo_hexdump_nospc(vec->sres, sizeof(vec->sres)));
+		printf("Kc:\t%s\n", osmo_hexdump_nospc(vec->kc, sizeof(vec->kc)));
 	}
 }