diff --git a/src/PVE/AccessControl.pm b/src/PVE/AccessControl.pm
index d7c5a71..8b1db58 100644
--- a/src/PVE/AccessControl.pm
+++ b/src/PVE/AccessControl.pm
@@ -1942,7 +1942,7 @@ sub assert_new_tfa_config_available() {
 	}
 	$info = from_json($info);
 	my $ver = $info->{version};
-	if ($ver !~ /^(\d+\.\d+)-(\d+)/) {
+	if ($ver !~ /^(\d+\.\d+)(?:[.-](\d+))?/) {
 	    $old .= "  cluster node '$node' provided an invalid version string: '$ver'\n";
 	    next;
 	}