diff --git a/protocol/protocol.tex b/protocol/protocol.tex
index be389bd9..b5c624cd 100644
--- a/protocol/protocol.tex
+++ b/protocol/protocol.tex
@@ -14499,7 +14499,7 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}.
 \lsection{Change History}{changehistory}
 
 
-\historyentry{2021.2.15}{}
+\historyentry{2021.2.15}{2021-09-01}
 \begin{itemize}
 \nufive{
     \item Correct a minor error in the proof of \theoremref{thmsinsemillacr}: