Change CLEANFILES to DISTCLEANFILES
diff --git a/Makefile.am b/Makefile.am
index 514900a..512d536 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,7 +24,7 @@ EXTRA_DIST = LICENSE ChangeLog.v1 ChangeLog.libgcj \
libtool-ldflags
# local.exp is generated by configure
-CLEANFILES = local.exp
+DISTCLEANFILES = local.exp
## ################################################################