diff --git a/Makefile.am b/Makefile.am
index 3e50d3c..7f5f37b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-SUBDIRS = src man
+SUBDIRS = src man doc
 
 nobase_include_HEADERS = tirpc/netconfig.h \
 			 tirpc/rpcsvc/crypt.x \