diff --git a/protocol/protocol.tex b/protocol/protocol.tex
index 9b90faf2..dfae8773 100644
--- a/protocol/protocol.tex
+++ b/protocol/protocol.tex
@@ -14557,7 +14557,7 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}.
 \lsection{Change History}{changehistory}
 
 
-\historyentry{2022.2.19}{}
+\historyentry{2022.2.19}{2022-01-19}
 \begin{itemize}
 \nufive{
     \item In \crossref{sighash}, add a consensus rule that \sighashType encodings \MUST