diff --git a/Makefile.am b/Makefile.am
index de6f83b..a025b69 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,4 +2,8 @@ AUTOMAKE_OPTIONS = foreign
 
 SUBDIRS = $(THEMES)
 
+MAINTAINERCLEANFILES = \
+ aclocal.m4 configure install-sh missing \
+ Makefile.in */Makefile.in */*/Makefile.in
+
 EXTRA_DIST = ChangeLog