diff --git a/protocol/protocol.tex b/protocol/protocol.tex
index e816d086..65856672 100644
--- a/protocol/protocol.tex
+++ b/protocol/protocol.tex
@@ -2759,9 +2759,7 @@ inclusive, in descending order.
 $a \bconcat b$ means the concatenation of sequences $a$ then $b$.
 
 $\concatbits(S)$ means the sequence of bits obtained by
-concatenating the elements of $S$ viewed as bit sequences. If the
-elements of $S$ are byte sequences, they are converted to bit sequences
-with the \emph{most significant} bit of each byte first.
+concatenating the elements of $S$ as bit sequences.
 
 $\sorted(S)$ means the sequence formed by sorting the elements
 of $S$.
@@ -14027,6 +14025,7 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}.
           as a QR code.
 } %sapling
     \item Move the definition of $\bot$ to before its first use.
+    \item Delete a confusing part of the definition of $\concatbits$ that we don't rely on.
     \item Add a definition for the \S{} symbol in \crossref{introduction}, before its first use.
     \item Remove specification of \memo contents, which will be in \cite{ZIP-302}.
     \item Remove support for building the \Sprout-only specification (\texttt{sprout.pdf}).