diff --git a/src/components/structures/RoomView.js b/src/components/structures/RoomView.js
index 34c711ee6f..ae3a4b2bac 100644
--- a/src/components/structures/RoomView.js
+++ b/src/components/structures/RoomView.js
@@ -1364,8 +1364,7 @@ module.exports = React.createClass({
 
         const showBar = this.refs.messagePanel.canJumpToReadMarker();
         if (this.state.showTopUnreadMessagesBar != showBar) {
-            this.setState({showTopUnreadMessagesBar: showBar},
-                          this.onChildResize);
+            this.setState({showTopUnreadMessagesBar: showBar});
         }
     },
 
@@ -1408,7 +1407,7 @@ module.exports = React.createClass({
         };
     },
 
-    onResize: function(e) {
+    onResize: function() {
         // It seems flexbox doesn't give us a way to constrain the auxPanel height to have
         // a minimum of the height of the video element, whilst also capping it from pushing out the page
         // so we have to do it via JS instead.  In this implementation we cap the height by putting
@@ -1426,9 +1425,6 @@ module.exports = React.createClass({
         if (auxPanelMaxHeight < 50) auxPanelMaxHeight = 50;
 
         this.setState({auxPanelMaxHeight: auxPanelMaxHeight});
-
-        // changing the maxHeight on the auxpanel will trigger a callback go
-        // onChildResize, so no need to worry about that here.
     },
 
     onFullscreenClick: function() {
@@ -1458,10 +1454,6 @@ module.exports = React.createClass({
         this.forceUpdate(); // TODO: just update the voip buttons
     },
 
-    onChildResize: function() {
-        // no longer anything to do here
-    },
-
     onStatusBarVisible: function() {
         if (this.unmounted) return;
         this.setState({
@@ -1654,7 +1646,6 @@ module.exports = React.createClass({
                 isPeeking={myMembership !== "join"}
                 onInviteClick={this.onInviteButtonClick}
                 onStopWarningClick={this.onStopAloneWarningClick}
-                onResize={this.onChildResize}
                 onVisible={this.onStatusBarVisible}
                 onHidden={this.onStatusBarHidden}
             />;
@@ -1723,7 +1714,6 @@ module.exports = React.createClass({
               draggingFile={this.state.draggingFile}
               displayConfCallNotification={this.state.displayConfCallNotification}
               maxHeight={this.state.auxPanelMaxHeight}
-              onResize={this.onChildResize}
               showApps={this.state.showApps}
               hideAppsDrawer={false} >
                 { aux }
@@ -1739,7 +1729,6 @@ module.exports = React.createClass({
             messageComposer =
                 <MessageComposer
                     room={this.state.room}
-                    onResize={this.onChildResize}
                     uploadFile={this.uploadFile}
                     callState={this.state.callState}
                     disabled={this.props.disabled}
diff --git a/src/components/views/rooms/MessageComposer.js b/src/components/views/rooms/MessageComposer.js
index 53668066ee..a76a45497b 100644
--- a/src/components/views/rooms/MessageComposer.js
+++ b/src/components/views/rooms/MessageComposer.js
@@ -412,7 +412,6 @@ export default class MessageComposer extends React.Component {
                 <MessageComposerInput
                     ref={(c) => this.messageComposerInput = c}
                     key="controls_input"
-                    onResize={this.props.onResize}
                     room={this.props.room}
                     placeholder={placeholderText}
                     onFilesPasted={this.uploadFiles}
@@ -505,10 +504,6 @@ export default class MessageComposer extends React.Component {
 }
 
 MessageComposer.propTypes = {
-    // a callback which is called when the height of the composer is
-    // changed due to a change in content.
-    onResize: PropTypes.func,
-
     // js-sdk Room object
     room: PropTypes.object.isRequired,
 
diff --git a/src/components/views/rooms/MessageComposerInput.js b/src/components/views/rooms/MessageComposerInput.js
index 6b80902c8f..cbea2bccb9 100644
--- a/src/components/views/rooms/MessageComposerInput.js
+++ b/src/components/views/rooms/MessageComposerInput.js
@@ -135,10 +135,6 @@ function rangeEquals(a: Range, b: Range): boolean {
  */
 export default class MessageComposerInput extends React.Component {
     static propTypes = {
-        // a callback which is called when the height of the composer is
-        // changed due to a change in content.
-        onResize: PropTypes.func,
-
         // js-sdk Room object
         room: PropTypes.object.isRequired,