diff --git a/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install b/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install
index 1f14f4ab0..9542bb6cf 100755
--- a/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install
+++ b/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install
@@ -14,7 +14,7 @@
 
 OS=`uname`
 #installroot='/install/netboot/sles11.1/x86_64/compute/rootimg'
-
+INSTALL_DIR='/install'
 #OFED_DIR='/install/post/otherpkgs/sles11.1/x86_64/ofed/'
 OFED_DIR=$ofeddir