diff --git a/udev.permissions.debian b/udev.permissions.debian
index 294982a824..5df3d0feac 100644
--- a/udev.permissions.debian
+++ b/udev.permissions.debian
@@ -107,3 +107,5 @@ pt*:root:tape:0660
 npt*:root:tape:0660
 st*:root:tape:0660
 nst*:root:tape:0660
+
+dm-*:root:root:0640