diff --git a/src/ScalarMessaging.js b/src/ScalarMessaging.js
index 3325044b84..7ec928f895 100644
--- a/src/ScalarMessaging.js
+++ b/src/ScalarMessaging.js
@@ -497,12 +497,11 @@ function canSendEvent(event, roomId) {
         sendError(event, _t('This room is not recognised.'));
         return;
     }
-    const me = client.credentials.userId;
-    const member = room.getMember(me);
-    if (!member || member.membership !== "join") {
+    if (room.getMyMembership() !== "join") {
         sendError(event, _t('You are not in this room.'));
         return;
     }
+    const me = client.credentials.userId;
 
     let canSend = false;
     if (isState) {
diff --git a/src/components/views/context_menus/RoomTileContextMenu.js b/src/components/views/context_menus/RoomTileContextMenu.js
index 77f71fa8fa..ce9895447e 100644
--- a/src/components/views/context_menus/RoomTileContextMenu.js
+++ b/src/components/views/context_menus/RoomTileContextMenu.js
@@ -346,20 +346,18 @@ module.exports = React.createClass({
     },
 
     render: function() {
-        const myMember = this.props.room.getMember(
-            MatrixClientPeg.get().credentials.userId,
-        );
+        const myMembership = this.props.room.getMyMembership();
 
         // Can't set notif level or tags on non-join rooms
-        if (myMember.membership !== 'join') {
-            return this._renderLeaveMenu(myMember.membership);
+        if (myMembership !== 'join') {
+            return this._renderLeaveMenu(myMembership);
         }
 
         return (
             <div>
                 { this._renderNotifMenu() }
                 <hr className="mx_RoomTileContextMenu_separator" />
-                { this._renderLeaveMenu(myMember.membership) }
+                { this._renderLeaveMenu(myMembership) }
                 <hr className="mx_RoomTileContextMenu_separator" />
                 { this._renderRoomTagMenu() }
             </div>
diff --git a/src/components/views/rooms/RoomSettings.js b/src/components/views/rooms/RoomSettings.js
index 7a78d205b9..3b95fa9905 100644
--- a/src/components/views/rooms/RoomSettings.js
+++ b/src/components/views/rooms/RoomSettings.js
@@ -794,15 +794,15 @@ module.exports = React.createClass({
         }
 
         let leaveButton = null;
-        const myMember = this.props.room.getMember(myUserId);
-        if (myMember) {
-            if (myMember.membership === "join") {
+        const myMemberShip = this.props.room.getMyMembership();
+        if (myMemberShip) {
+            if (myMemberShip === "join") {
                 leaveButton = (
                     <AccessibleButton className="mx_RoomSettings_leaveButton" onClick={this.onLeaveClick}>
                         { _t('Leave room') }
                     </AccessibleButton>
                 );
-            } else if (myMember.membership === "leave") {
+            } else if (myMemberShip === "leave") {
                 leaveButton = (
                     <AccessibleButton className="mx_RoomSettings_leaveButton" onClick={this.onForgetClick}>
                         { _t('Forget room') }