diff --git a/MANIFEST b/MANIFEST
index 1b9496e33..35bc4a2d6 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -114,6 +114,8 @@ include/sudo_plugin.h
 indent.pro
 install-sh
 ltmain.sh
+m4/ax_check_compile_flag.m4
+m4/ax_check_link_flag.m4
 m4/libtool.m4
 m4/ltoptions.m4
 m4/ltsugar.m4