diff --git a/meta-citadel/recipes-initrd/citadel-initramfs/files/11-dm.rules b/meta-citadel/recipes-initrd/citadel-initramfs/files/11-dm.rules
index 89941c4..9c7ad3b 100644
--- a/meta-citadel/recipes-initrd/citadel-initramfs/files/11-dm.rules
+++ b/meta-citadel/recipes-initrd/citadel-initramfs/files/11-dm.rules
@@ -1,3 +1,4 @@
+# https://github.com/systemd/systemd/issues/1551
 SUBSYSTEM!="block", GOTO="dm_end"
 KERNEL!="dm-[0-9]*", GOTO="dm_end"
 ACTION!="add|change", GOTO="dm_end"