upstream issue: https://bugzilla.xfce.org/show_bug.cgi?id=16608

diff --git a/po/POTFILES.in b/po/POTFILES.in
index c932cc2..4a50572 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -12,3 +12,6 @@ panel-plugin/collector.c
 panel-plugin/history.c
 panel-plugin/menu.c
 panel-plugin/plugin.c
+panel-plugin/common.c
+panel-plugin/xfce4-clipman-history.c
+panel-plugin/xfce4-clipman-settings.desktop.in