diff --git a/.tx/config b/.tx/config
index 3c276f3..89303e5 100644
--- a/.tx/config
+++ b/.tx/config
@@ -66,3 +66,9 @@ file_filter = citadel/indico_citadel/translations/<lang>/LC_MESSAGES/messages.po
 source_file = citadel/indico_citadel/translations/messages.pot
 source_lang = en
 type = PO
+
+[indico.themes_legacy-messages]
+file_filter = themes_legacy/indico_themes_legacy/translations/<lang>/LC_MESSAGES/messages.po
+source_file = themes_legacy/indico_themes_legacy/translations/messages.pot
+source_lang = en
+type = PO