diff --git a/protocol/protocol.tex b/protocol/protocol.tex
index 94572aa8..44d964cd 100644
--- a/protocol/protocol.tex
+++ b/protocol/protocol.tex
@@ -14530,7 +14530,7 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}.
 \lsection{Change History}{changehistory}
 
 
-\historyentry{2021.2.17}{}
+\historyentry{2021.2.17}{2021-12-01}
 \begin{itemize}
     \item Add notes in\sapling{ \crossref{reddsabatchvalidate}, \crossref{grothbatchverify}, and}
           \crossref{ed25519batchvalidate} that $z_j$ may be sampled from $\range{0}{2^{128}-1}$