diff --git a/js/libtextsecure.js b/js/libtextsecure.js
index 78206dc671..1580c63ab8 100644
--- a/js/libtextsecure.js
+++ b/js/libtextsecure.js
@@ -37494,11 +37494,11 @@ MessageSender.prototype = {
         }.bind(this));
     },
 
-    closeSession: function(number) {
+    closeSession: function(number, timestamp) {
         var proto = new textsecure.protobuf.DataMessage();
         proto.body = "TERMINATE";
         proto.flags = textsecure.protobuf.DataMessage.Flags.END_SESSION;
-        return this.sendIndividualProto(number, proto, Date.now()).then(function(res) {
+        return this.sendIndividualProto(number, proto, timestamp).then(function(res) {
             return textsecure.storage.devices.getDeviceObjectsForNumber(number).then(function(devices) {
                 return Promise.all(devices.map(function(device) {
                     return textsecure.protocol_wrapper.closeOpenSessionForDevice(device.encodedNumber);
diff --git a/js/models/conversations.js b/js/models/conversations.js
index aa6fdeccdc..57fbb833a4 100644
--- a/js/models/conversations.js
+++ b/js/models/conversations.js
@@ -133,7 +133,7 @@
                 received_at    : now,
                 flags          : textsecure.protobuf.DataMessage.Flags.END_SESSION
             });
-            message.send(textsecure.messaging.closeSession(this.id));
+            message.send(textsecure.messaging.closeSession(this.id, now));
         }
 
     },
diff --git a/libtextsecure/sendmessage.js b/libtextsecure/sendmessage.js
index 22a3c6b14b..eaee8a404f 100644
--- a/libtextsecure/sendmessage.js
+++ b/libtextsecure/sendmessage.js
@@ -152,11 +152,11 @@ MessageSender.prototype = {
         }.bind(this));
     },
 
-    closeSession: function(number) {
+    closeSession: function(number, timestamp) {
         var proto = new textsecure.protobuf.DataMessage();
         proto.body = "TERMINATE";
         proto.flags = textsecure.protobuf.DataMessage.Flags.END_SESSION;
-        return this.sendIndividualProto(number, proto, Date.now()).then(function(res) {
+        return this.sendIndividualProto(number, proto, timestamp).then(function(res) {
             return textsecure.storage.devices.getDeviceObjectsForNumber(number).then(function(devices) {
                 return Promise.all(devices.map(function(device) {
                     return textsecure.protocol_wrapper.closeOpenSessionForDevice(device.encodedNumber);