diff --git a/doc/Makefile.am b/doc/Makefile.am
index ce9eef5b..9f790892 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -37,6 +37,7 @@ APIDOCS= \
 	nghttp2_hd_deflate_get_num_table_entries.rst \
 	nghttp2_hd_deflate_get_table_entry.rst \
 	nghttp2_hd_deflate_hd.rst \
+	nghttp2_hd_deflate_hd_vec.rst \
 	nghttp2_hd_deflate_new.rst \
 	nghttp2_hd_deflate_new2.rst \
 	nghttp2_hd_inflate_change_table_size.rst \