diff --git a/po/POTFILES.in b/po/POTFILES.in
index 0019e7b3..3efedb3e 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -29,6 +29,7 @@ app/flatpak-builtins-uninstall.c
 app/flatpak-builtins-update.c
 app/flatpak-main.c
 app/flatpak-transaction.c
+builder/builder-module.c
 common/flatpak-dir.c
 common/flatpak-run.c
 common/flatpak-utils.c