diff --git a/data/core/about_i18n.cfg b/data/core/about_i18n.cfg
index 5d5ddde8b8d1..0d8046de52e3 100644
--- a/data/core/about_i18n.cfg
+++ b/data/core/about_i18n.cfg
@@ -1,3 +1,5 @@
+#textdomain wesnoth
+
 sort=yes
 
 [about]