diff --git a/README.md b/README.md
index 5fea452..7a96397 100644
--- a/README.md
+++ b/README.md
@@ -179,7 +179,8 @@ Bees has not been tested with the following, and undesirable interactions may oc
 * btrfs qgroups (never tested, no idea what might happen)
 * btrfs seed filesystems (does anyone even use those?)
 * btrfs autodefrag mount option (never tested, could fight with Bees)
-* btrfs nodatacow mount option or inode attribute (*could* work, but might not)
+* btrfs nodatacow inode attribute (needs datasum detection on extents, skipped for now)
+* btrfs nodatacow mount option (*could* work, but might not, skipped due to above note)
 * btrfs out-of-tree kernel patches (e.g. in-band dedup or encryption)
 * btrfs-convert from ext2/3/4 (never tested)
 * btrfs mixed block groups (don't know a reason why it would *not* work, but never tested)