diff --git a/src/shared/dns-domain.h b/src/shared/dns-domain.h
index e5f3d4d9e72..08cb1cc2aac 100644
--- a/src/shared/dns-domain.h
+++ b/src/shared/dns-domain.h
@@ -40,8 +40,8 @@ static inline int dns_name_normalize(const char *s, DNSLabelFlags flags, char **
 static inline int dns_name_is_valid(const char *s) {
         int r;
 
-        /* dns_name_normalize() verifies as a side effect */
-        r = dns_name_normalize(s, 0, NULL);
+        /* dns_name_concat() verifies as a side effect */
+        r = dns_name_concat(s, NULL, 0, NULL);
         if (r == -EINVAL)
                 return 0;
         if (r < 0)