diff --git a/doc/developer/subdir.am b/doc/developer/subdir.am
index 43d1290044..575722a805 100644
--- a/doc/developer/subdir.am
+++ b/doc/developer/subdir.am
@@ -23,6 +23,7 @@ dev_RSTFILES = \
 	doc/developer/building-frr-for-ubuntu1404.rst \
 	doc/developer/building-frr-for-ubuntu1604.rst \
 	doc/developer/building-frr-for-ubuntu1804.rst \
+	doc/developer/building-libyang.rst \
 	doc/developer/building.rst \
 	doc/developer/cli.rst \
 	doc/developer/conf.py \