diff --git a/src/chatmodel.cpp b/src/chatmodel.cpp
index d3b41ba..eaee84c 100644
--- a/src/chatmodel.cpp
+++ b/src/chatmodel.cpp
@@ -380,10 +380,10 @@ QString MainWindow::createHeaderMemo(QString type, QString cid, QString zaddr, Q
     QJsonObject h;
     // We use short keynames to use less space for metadata and so allow
     // the user to send more actual data in memos
-    h["h"]   = headerNumber;    // integer, header number
-    h["v"]   = version;         // integer, HushChat version
+    h["h"]   = headerNumber;    // integer, header number starting from 1
+    h["v"]   = version;         // integer, HushChat version. currently 0
     h["z"]   = zaddr;           // string, zaddr to respond to
-    h["cid"] = cid;             // string, conversation id
+    h["cid"] = cid;             // string, conversation id (UUID)
     h["t"]   = type;            // string, Memo or incoming contact request
     h["e"]   = headerbytes;     // string, hex-encoded libsodium headerbytes
     h["p"]   = publickey;       // string, hex-encoded libsodium public key