diff --git a/doc/Changelog b/doc/Changelog
index 77c4b554f..d63f490f5 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -3,6 +3,7 @@
 	  unbound/pythonmod/examples/log.py.
 	- Fix #1324: Memory leak in 'msgparse.c' in
 	  'parse_edns_options_from_query(...)'.
+	- Fix indentation in tcp-mss option parsing.
 
 1 September 2025: Wouter
 	- Fix for #1324: Fix to free edns options scratch in ratelimit case.
diff --git a/util/configparser.y b/util/configparser.y
index ba754b3e5..82e1d8782 100644
--- a/util/configparser.y
+++ b/util/configparser.y
@@ -954,7 +954,7 @@ server_tcp_mss: VAR_TCP_MSS STRING_ARG
 	{
 		OUTYY(("P(server_tcp_mss:%s)\n", $2));
 		if(atoi($2) == 0 && strcmp($2, "0") != 0)
-				yyerror("number expected");
+			yyerror("number expected");
 		else cfg_parser->cfg->tcp_mss = atoi($2);
 		free($2);
 	}