diff --git a/build/autoconf/lustre-build.m4 b/build/autoconf/lustre-build.m4
index 77117ef01d366e9c14c95543d0e88861c1045639..85acefaf9c70b336a609d0edd91e0de2b2b26ed7 100644
--- a/build/autoconf/lustre-build.m4
+++ b/build/autoconf/lustre-build.m4
@@ -488,7 +488,7 @@ AC_SUBST(SYSIO)
 
 LB_LINUX_CONDITIONALS
 LB_DARWIN_CONDITIONALS
-LB_SUNOS_CONDITIONALS
+# LB_SUNOS_CONDITIONALS
 
 LN_CONDITIONALS
 LC_CONDITIONALS