diff --git a/xCAT-server/share/xcat/netboot/rh/genimage b/xCAT-server/share/xcat/netboot/rh/genimage
index 8b70bbd3d..17af96a40 100755
--- a/xCAT-server/share/xcat/netboot/rh/genimage
+++ b/xCAT-server/share/xcat/netboot/rh/genimage
@@ -1088,7 +1088,7 @@ EOMS
     print $inifile "if [ -r /rootimg-statelite.gz ]; then\n";
     print $inifile "echo Setting up RAM-root tmpfs.\n";
     if ($rootlimit) {
-        print $inifile "    mount -o size=$rootlimit mode=755 -t tmpfs rootfs \$NEWROOT \n";
+        print $inifile "    mount -o size=$rootlimit,mode=755 -t tmpfs rootfs \$NEWROOT \n";
     } else {
         print $inifile "    mount -o mode=755 -t tmpfs rootfs \$NEWROOT\n";
     }
@@ -1210,7 +1210,7 @@ EOMS
    print $inifile "elif [ -r /rootimg.gz ]; then\n";
    print $inifile "echo Setting up RAM-root tmpfs.\n";
    if ($rootlimit) {
-      print $inifile "  mount -o size=$rootlimit mode=755 -t tmpfs rootfs \$NEWROOT\n";
+      print $inifile "  mount -o size=$rootlimit,mode=755 -t tmpfs rootfs \$NEWROOT\n";
    } else {
       print $inifile "  mount -o  mode=755 -t tmpfs rootfs \$NEWROOT\n";
    }
diff --git a/xCAT-server/share/xcat/netboot/sles/genimage b/xCAT-server/share/xcat/netboot/sles/genimage
index 79fd31eec..2869c95ce 100755
--- a/xCAT-server/share/xcat/netboot/sles/genimage
+++ b/xCAT-server/share/xcat/netboot/sles/genimage
@@ -963,7 +963,6 @@ fi
 
 export IFACE=\$IFACE
 
-
 netstart \$IFACE
 while ! ifconfig | grep inet; do
     echo -e "\${RED}Failed to acquire address, retrying \${RESET}"
@@ -1045,7 +1044,7 @@ EOMS
     print $inifile "if [ -r /rootimg-statelite.gz ]; then \n";
     print $inifile "echo Setting up RAM-root tmpfs.\n";
     if ($rootlimit) {
-        print $inifile "    mount -o size=$rootlimit mode=755 -t tmpfs rootfs \$NEWROOT \n";
+        print $inifile "    mount -o size=$rootlimit,mode=755 -t tmpfs rootfs \$NEWROOT \n";
     } else {
         print $inifile "    mount -o mode=755 -t tmpfs rootfs \$NEWROOT \n";
     }
@@ -1183,7 +1182,7 @@ EOMS
    print $inifile "elif [ -r /rootimg.gz ]; then\n";
    print $inifile "echo Setting up RAM-root tmpfs.\n";
    if ($rootlimit) {
-      print $inifile "  mount -o size=$rootlimit  mode=755 -t tmpfs rootfs \$NEWROOT\n";
+      print $inifile "  mount -o size=$rootlimit,mode=755 -t tmpfs rootfs \$NEWROOT\n";
    } else {
       print $inifile "  mount -o  mode=755 -t tmpfs rootfs \$NEWROOT\n";
    }