diff --git a/games-action/netrek-cow/netrek-cow-3.3.2.ebuild b/games-action/netrek-cow/netrek-cow-3.3.2.ebuild
index f5e252233a..2b5029da12 100644
--- a/games-action/netrek-cow/netrek-cow-3.3.2.ebuild
+++ b/games-action/netrek-cow/netrek-cow-3.3.2.ebuild
@@ -1,8 +1,8 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
-inherit autotools
+inherit autotools flag-o-matic
 
 DESCRIPTION="cow client for netrek"
 HOMEPAGE="https://netrek.org"
@@ -36,6 +36,12 @@ src_prepare() {
 	eautoreconf
 }
 
+src_configure() {
+	# Incompatible function declarations under C23. Bug #945213
+	append-cflags -std=gnu17
+	default
+}
+
 src_install() {
 	dobin netrek-client-cow
 }