diff --git a/build/autoconf/lustre-build.m4 b/build/autoconf/lustre-build.m4
index f6ff4c4ebe7c42039ae076c296570d083f25c705..c00d42432cb363e9c0eef8429b3d62c301a4fa04 100644
--- a/build/autoconf/lustre-build.m4
+++ b/build/autoconf/lustre-build.m4
@@ -692,7 +692,7 @@ LB_CONFIG_TESTS
 LC_CONFIG_CLIENT_SERVER
 
 # two macros for cmd3 
-LC_CONFIG_SPLIT
+m4_ifdef([LC_CONFIG_SPLIT], [LC_CONFIG_SPLIT])
 LN_CONFIG_CDEBUG
 LC_QUOTA