1 files changed, 2 insertions, 2 deletions
diff --git a/bip-0075.mediawiki b/bip-0075.mediawiki
index 9babf89..878d708 100644
--- a/bip-0075.mediawiki
+++ b/bip-0075.mediawiki
@@ -141,7 +141,7 @@ message ProtocolMessage {
     required ProtocolMessageType message_type = 3;
     required bytes serialized_message = 4;
     optional string status_message = 5;
-    optional bytes identifier = 6;
+    required bytes identifier = 6;
 }
 </pre>
 
@@ -177,7 +177,7 @@ message EncryptedProtocolMessage {
     required bytes receiver_public_key = 5;
     required bytes sender_public_key = 6;
     required uint64 nonce = 7;
-    optional bytes identifier = 8;
+    required bytes identifier = 8;
     optional string status_message = 9;
     optional bytes signature = 10;
 }