diff --git a/doc/Makefile.am b/doc/Makefile.am
index f773942..16e57ed 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,4 +1,5 @@
 EXTRA_DIST = morituri.rss2 morituri.ics $(man_MANS)
+DISTCLEANFILES = $(man_MANS)
 
 all-local: feeds reference