diff --git a/R/shiny.R b/R/shiny.R
index ef9f255c77..526158f5b1 100644
--- a/R/shiny.R
+++ b/R/shiny.R
@@ -220,11 +220,11 @@ workerId <- local({
 #'   `sendCustomMessage` is called on the server.
 #' }
 #' \item{sendBinaryMessage(type, message)}{
-#'   Similar to `sendCustomMessage`, but the message must be a raw vector
-#'   and the registration method on the client is
-#'   \code{Shiny.addBinaryMessageHandler(type, function(message){...})}. The
-#'   message argument on the client will be a
-#'   [DataView](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView).
+#'   Similar to sendCustomMessage, but the message must be a raw vector.
+#'   The registration method on the client is the same as for other custom messages:
+#'   \code{Shiny.addCustomMessageHandler(type, function(message){...})}. The
+#'   message argument on the client will be an
+#'   [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer).
 #' }
 #' \item{sendInputMessage(inputId, message)}{
 #'   Sends a message to an input on the session's client web page; if the input
diff --git a/man/session.Rd b/man/session.Rd
index 3172ee284a..3626899cf6 100644
--- a/man/session.Rd
+++ b/man/session.Rd
@@ -130,11 +130,11 @@ as the page loads; the function you provide to
 \code{sendCustomMessage} is called on the server.
 }
 \item{sendBinaryMessage(type, message)}{
-Similar to \code{sendCustomMessage}, but the message must be a raw vector
-and the registration method on the client is
-\code{Shiny.addBinaryMessageHandler(type, function(message){...})}. The
-message argument on the client will be a
-\href{https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView}{DataView}.
+Similar to sendCustomMessage, but the message must be a raw vector.
+The registration method on the client is the same as for other custom messages:
+\code{Shiny.addCustomMessageHandler(type, function(message){...})}. The
+message argument on the client will be an
+\href{https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer}{ArrayBuffer}.
 }
 \item{sendInputMessage(inputId, message)}{
 Sends a message to an input on the session's client web page; if the input