diff --git a/shared/nm-glib-aux/nm-shared-utils.c b/shared/nm-glib-aux/nm-shared-utils.c
index 5b8f96b151..66147e60f1 100644
--- a/shared/nm-glib-aux/nm-shared-utils.c
+++ b/shared/nm-glib-aux/nm-shared-utils.c
@@ -4919,9 +4919,11 @@ _nm_utils_format_variant_attributes_full (GString *str,
 			value = g_variant_get_boolean (variant) ? "true" : "false";
 		else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_STRING))
 			value = g_variant_get_string (variant, NULL);
-		else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BYTESTRING))
+		else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BYTESTRING)) {
+			/* FIXME: there is no guarantee that the byte array
+			 * is valid UTF-8.*/
 			value = g_variant_get_bytestring (variant);
-		else
+		} else
 			continue;
 
 		if (sep)