diff --git a/bip-0046.mediawiki b/bip-0046.mediawiki
index 7f2ef5e6..b793a1a2 100644
--- a/bip-0046.mediawiki
+++ b/bip-0046.mediawiki
@@ -31,6 +31,10 @@ This standard is already implemented and deployed in JoinMarket. As most changes
 
 It would be useful to be able to keep the private keys of fidelity bonds in cold storage. This would allow the sybil resistance of a system to increase without hot wallet risk.
 
+== Backwards Compatibility ==
+
+This BIP is not backwards compatible by design as described in the Considerations section of [[bip-0049.mediawiki|BIP 49]]. An incompatible wallet will not discover fidelity bonds at all and the user will notice that something is wrong.
+
 == Background ==
 
 === Fidelity bonds ===