diff --git a/build/autoconf/lustre-build.m4 b/build/autoconf/lustre-build.m4
index 59dc4ffbc6b841d45aac0744ba78903ee55ef97a..90753fd30013c7fbd2b32b69d7b2f03240d0323e 100644
--- a/build/autoconf/lustre-build.m4
+++ b/build/autoconf/lustre-build.m4
@@ -466,6 +466,7 @@ LB_PATH_CRAY_PORTALS
 LB_CONFIG_DOCS
 LB_CONFIG_UTILS
 LB_CONFIG_TESTS
+LC_CONFIG_CLIENT_SERVER
 
 LB_CONFIG_MODULES