diff --git a/protob/types.proto b/protob/types.proto
index 34a9ff436..f69d7dd69 100644
--- a/protob/types.proto
+++ b/protob/types.proto
@@ -168,6 +168,7 @@ message CoinType {
 	optional string signed_message_header = 8;
 	optional uint32 xpub_magic = 9 [default=0x0488b21e];
 	optional uint32 xprv_magic = 10 [default=0x0488ade4];
+	optional bool segwit = 11;
 }
 
 /**