diff --git a/defaults/linuxrc b/defaults/linuxrc
index 00bb3ee..d18e7f0 100755
--- a/defaults/linuxrc
+++ b/defaults/linuxrc
@@ -84,6 +84,7 @@ for x in ${CMDLINE}; do
             USE_LVM_NORMAL=1
         ;;
         domdadm)
+            # TODO(lxnay): enable this implicitly if /sbin/mdadm is available
             USE_MDADM=1
         ;;
         dodmraid)