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 69c03da1f..ef2c2e23f 100755
--- a/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install
+++ b/xCAT-server/share/xcat/ib/scripts/Mellanox/mlnxofed_ib_install
@@ -162,7 +162,7 @@ function hack_uname()
                             for d in \$(ls /lib/modules | sort -V) 
                             do 
                                 rpm -q kernel-\$d >/dev/null 2>&1
-                                if [ "\$?" == "0" ] ; then
+                                if [ "\$?" -eq "0" ] ; then
                                     echo \$d
                                     break 
                                 fi