diff --git a/i2p2www/spec/tunnel-creation-ecies.rst b/i2p2www/spec/tunnel-creation-ecies.rst
index 46c3dd73..712cf486 100644
--- a/i2p2www/spec/tunnel-creation-ecies.rst
+++ b/i2p2www/spec/tunnel-creation-ecies.rst
@@ -906,6 +906,9 @@ Implementation Notes
 Build Records
 -------------
 
+Build record order must be randomized, so middle hops do not
+know their location within the tunnel.
+
 The recommended minimum number of build records is 4.
 If there are more build records than hops, "fake" records must be added,
 containing random or implementation-specific data.