diff --git a/man/Makefile.am b/man/Makefile.am
index 923851aa..1d4c153b 100644
--- a/man/Makefile.am
+++ b/man/Makefile.am
@@ -1,2 +1,4 @@
+MAINTAINERCLEANFILES = Makefile.in
+
 man1_MANS = terminology.1
 EXTRA_DIST = terminology.1