diff --git a/mambawelcome/mambawelcome.sh b/mambawelcome/mambawelcome.sh
index 8298914..da0a4be 100755
--- a/mambawelcome/mambawelcome.sh
+++ b/mambawelcome/mambawelcome.sh
@@ -45,7 +45,7 @@ Copyright (c) 2007-2010 by Silvan Calarco <silvan.calarco@mambasoft.it>
 dcop_write $"Configuring..." 5
 
 # update grub device mappings and config
-/usr/sbin/grub-mkdevicemap -n
+[ -e /usr/sbin/grub-mkdevicemap ] && /usr/sbin/grub-mkdevicemap -n
 /usr/sbin/update-grub
 
 [ -r $INPUT_FILE ] || {