diff --git a/modules.d/90dm/dm-pre-udev.sh b/modules.d/90dm/dm-pre-udev.sh
index 8fdaeaf3..dfa45419 100755
--- a/modules.d/90dm/dm-pre-udev.sh
+++ b/modules.d/90dm/dm-pre-udev.sh
@@ -1 +1 @@
-modprobe dm_mod 
+strstr "$(cat /proc/misc)" device-mapper || modprobe dm_mod