diff --git a/README.android b/README.android
index 0af0512..81e2d36 100644
--- a/README.android
+++ b/README.android
@@ -16,3 +16,6 @@
 emoji-zwj-sequences.txt has been updated to Emoji 5.0 beta version, with
 sequences containing Unicode 10.0 and golfers with skin tones commented out
 (because we don't support those in our emoji font yet).
+
+An additions directory has been added for sequences that we need to support
+in addition to what's specified by Unicode.