diff --git a/po/Rules-lyx b/po/Rules-lyx
index f061cd904b..01883c4c45 100644
--- a/po/Rules-lyx
+++ b/po/Rules-lyx
@@ -18,6 +18,7 @@ ${srcdir}/POTFILES.in: $(POTFILE_IN_DEPS)
 
 l10n_pots: qt4_l10n.pot layouts_l10n.pot languages_l10n.pot latexfonts_l10n.pot encodings_l10n.pot ui_l10n.pot external_l10n.pot formats_l10n.pot
 	cat $^ | msguniq -o $(DOMAIN).po
+	rm $^
 
 LYX_POT = LC_ALL=C ; export LC_ALL ; \
   $(PYTHON) $(srcdir)/lyx_pot.py -b $(top_srcdir)