diff --git a/internal/web/actions/default/dns/domains/domainutils/utils.go b/internal/web/actions/default/dns/domains/domainutils/utils.go
index de0bb7ca..48596e4e 100644
--- a/internal/web/actions/default/dns/domains/domainutils/utils.go
+++ b/internal/web/actions/default/dns/domains/domainutils/utils.go
@@ -77,7 +77,7 @@ func ValidateRecordName(name string) bool {
 			strings.HasSuffix(piece, "-") ||
 			strings.Contains(piece, "--") ||
 			len(piece) > 63 ||
-			!regexp.MustCompile(`^[a-z0-9-]+$`).MatchString(piece) {
+			!regexp.MustCompile(`^[_a-z0-9-]+$`).MatchString(piece) {
 			return false
 		}
 	}