diff --git a/doc/Makefile.am b/doc/Makefile.am
index 1d0c85271..061b37b10 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1 +1 @@
-EXTRA_DIST = LTP-User-Guide-v2.1.doc
+EXTRA_DIST = ltp-document-2.1.md