diff --git a/pym/cl_fill_install.py b/pym/cl_fill_install.py
index 05f061a..30e0ebd 100644
--- a/pym/cl_fill_install.py
+++ b/pym/cl_fill_install.py
@@ -645,9 +645,9 @@ class fillVars(object, glob_attr):
         if self.Get('os_install_root_type') == 'usb-hdd':
             attr = " scandelay=5"
         if self.Get('os_install_mdadm_set') == 'on':
-            attr += "domdadm"
+            attr += " domdadm"
         if self.Get('os_install_lvm_set') == 'on':
-            attr += "dolvm"
+            attr += " dolvm"
         return attr
 
     def get_os_install_kernel_resume(self):