diff --git a/src/components/views/rooms/MessageComposer.js b/src/components/views/rooms/MessageComposer.js
index f2894bd6b3..a3ad033acc 100644
--- a/src/components/views/rooms/MessageComposer.js
+++ b/src/components/views/rooms/MessageComposer.js
@@ -75,7 +75,7 @@ module.exports = React.createClass({
 
         // a callback which is called when the height of the composer is
         // changed due to a change in content.
-        onResize: React.PropTypes.function,
+        onResize: React.PropTypes.func,
     },
 
     componentWillMount: function() {
diff --git a/src/components/views/voip/CallView.js b/src/components/views/voip/CallView.js
index 98bad37467..ed44313b9e 100644
--- a/src/components/views/voip/CallView.js
+++ b/src/components/views/voip/CallView.js
@@ -36,7 +36,7 @@ module.exports = React.createClass({
     propTypes: {
         // a callback which is called when the video within the callview
         // due to a change in video metadata
-        onResize: React.PropTypes.function,
+        onResize: React.PropTypes.func,
     },
 
     componentDidMount: function() {
diff --git a/src/components/views/voip/VideoFeed.js b/src/components/views/voip/VideoFeed.js
index 88d1b50cce..c4a65d1145 100644
--- a/src/components/views/voip/VideoFeed.js
+++ b/src/components/views/voip/VideoFeed.js
@@ -24,7 +24,7 @@ module.exports = React.createClass({
     propTypes: {
         // a callback which is called when the video element is resized
         // due to a change in video metadata
-        onResize: React.PropTypes.function,
+        onResize: React.PropTypes.func,
     },
 
     componentDidMount() {