diff --git a/Comments:BIP-0084.md b/Comments:BIP-0084.md
new file mode 100644
index 0000000..4051ca7
--- /dev/null
+++ b/Comments:BIP-0084.md
@@ -0,0 +1 @@
+This BIP should contain information about which 'version bytes' should be used in the serialization format to get the 'zpub' and 'zprv' prefixes in the test vectors. -- Rik Snel, 2018-01-17
\ No newline at end of file