diff --git a/make/autoconf.mk b/make/autoconf.mk
index a1e0b097..59122340 100644
--- a/make/autoconf.mk
+++ b/make/autoconf.mk
@@ -12,7 +12,7 @@ all: config $(AC_FILES)
 config: config.acdone $(AC_FILES)
 install: config $(AC_FILES)
 confclean:
-	rm -f $(DISTCLEAN) $(CLEAN)
+	rm -f $(DISTCLEAN) $(CLEAN) $(AC_FILES)
 configure.ac: configure.ac.tmpl VERSION
 	cat $< | sed -e "s/_VERSION_/`cat VERSION | sed 's/-dev//'`/" > $@