diff --git a/webclient/room/room-controller.js b/webclient/room/room-controller.js
index d8c62c231e..a1d2e87039 100644
--- a/webclient/room/room-controller.js
+++ b/webclient/room/room-controller.js
@@ -603,9 +603,9 @@ angular.module('RoomController', ['ngSanitize', 'matrixFilter', 'mFileInput'])
             var echoMessage = {
                 content: {
                     body: (cmd === "/me" ? args : input),
-                    hsob_ts: new Date().getTime(), // fake a timestamp
                     msgtype: (cmd === "/me" ? "m.emote" : "m.text"),
                 },
+                origin_server_ts: new Date().getTime(), // fake a timestamp
                 room_id: $scope.room_id,
                 type: "m.room.message",
                 user_id: $scope.state.user_id,
@@ -640,7 +640,7 @@ angular.module('RoomController', ['ngSanitize', 'matrixFilter', 'mFileInput'])
 
                     if (echoMessage) {
                         // Mark the message as unsent for the rest of the page life
-                        echoMessage.content.hsob_ts = "Unsent";
+                        echoMessage.origin_server_ts = "Unsent";
                         echoMessage.echo_msg_state = "messageUnSent";
                     }
                 });
diff --git a/webclient/room/room.html b/webclient/room/room.html
index 79a60585a5..a3f8aee7ab 100644
--- a/webclient/room/room.html
+++ b/webclient/room/room.html
@@ -68,7 +68,6 @@
          ng-hide="state.permission_denied" 
          ng-style="{ 'visibility': state.messages_visibility }"
          keep-scroll>
-        <!-- FIXME: need to have better timestamp semantics than the (msg.content.hsob_ts || msg.ts) hack below -->
         <table id="messageTable" infinite-scroll="paginateMore()">
             <tr ng-repeat="msg in events.rooms[room_id].messages"
                 ng-class="(events.rooms[room_id].messages[$index + 1].user_id !== msg.user_id ? 'differentUser' : '') + (msg.user_id === state.user_id ? ' mine' : '')" scroll-item>
@@ -76,7 +75,7 @@
                     <div class="sender" ng-hide="events.rooms[room_id].messages[$index - 1].user_id === msg.user_id"> {{ msg.user_id | mUserDisplayName: room_id }}</div>
                     <div class="timestamp"
                          ng-class="msg.echo_msg_state">
-                        {{ (msg.content.hsob_ts || msg.ts) | date:'MMM d HH:mm' }}
+                        {{ (msg.origin_server_ts) | date:'MMM d HH:mm' }}
                     </div>
                 </td>
                 <td class="avatar">