diff --git a/po/POTFILES.in b/po/POTFILES.in
index 52600abd..0e3b4337 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -54,6 +54,7 @@ common/flatpak-dir-utils.c
 common/flatpak-dir.c
 common/flatpak-exports.c
 common/flatpak-glib-backports.c
+common/flatpak-image-source.c
 common/flatpak-installation.c
 common/flatpak-instance.c
 common/flatpak-oci-registry.c