--- a/Makefile.am
+++ b/Makefile.am
@@ -4,8 +4,8 @@
 sbin_PROGRAMS =
 EXTRA_DIST =
 
-docdir = $(datadir)/doc/packages/@PACKAGE@
-doc_DATA = README COPYING
+docdir ?= $(datadir)/doc/packages/@PACKAGE@
+doc_DATA = Changelog README
 
 bin_SCRIPTS = scripts/amsstat