diff --git a/kdc/pkinit.c b/kdc/pkinit.c
index 2071b12e0..bd24b8fb7 100644
--- a/kdc/pkinit.c
+++ b/kdc/pkinit.c
@@ -1633,7 +1633,7 @@ match_ms_upn_san(krb5_context context,
     }
     if (size != list.val[0].length) {
 	free_MS_UPN_SAN(&upn);
-	kdc_log(context, config, 0, "Trailing data in ");
+	kdc_log(context, config, 0, "Trailing data in MS UPN SAN");
 	ret = KRB5_KDC_ERR_CLIENT_NAME_MISMATCH;
 	goto out;
     }