diff --git a/js/libtextsecure.js b/js/libtextsecure.js
index eb111990f..512d2ae86 100644
--- a/js/libtextsecure.js
+++ b/js/libtextsecure.js
@@ -38691,8 +38691,6 @@ function OutgoingMessage(server, timestamp, numbers, message, callback) {
     this.numbers = numbers;
     this.message = message; // ContentMessage proto
     this.callback = callback;
-    this.legacy = (message instanceof textsecure.protobuf.DataMessage);
-
 
     this.numbersCompleted = 0;
     this.errors = [];
diff --git a/libtextsecure/outgoing_message.js b/libtextsecure/outgoing_message.js
index f7322323d..809708e46 100644
--- a/libtextsecure/outgoing_message.js
+++ b/libtextsecure/outgoing_message.js
@@ -12,8 +12,6 @@ function OutgoingMessage(server, timestamp, numbers, message, callback) {
     this.numbers = numbers;
     this.message = message; // ContentMessage proto
     this.callback = callback;
-    this.legacy = (message instanceof textsecure.protobuf.DataMessage);
-
 
     this.numbersCompleted = 0;
     this.errors = [];