diff --git a/Makefile.am b/Makefile.am
index 7cec0ef..da1cf81 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,6 +24,7 @@ DISTCLEANFILES =							\
 	intltool-extract						\
 	intltool-merge							\
 	intltool-update							\
+	po/.intltool-merge-cache.lock					\
 	$(desktop_DATA)
 
 # vi:set ts=8 sw=8 noet ai nocindent syntax=automake: