diff --git a/src/components/views/messages/EditHistoryMessage.js b/src/components/views/messages/EditHistoryMessage.js
index 7f00449156..70f3d207e0 100644
--- a/src/components/views/messages/EditHistoryMessage.js
+++ b/src/components/views/messages/EditHistoryMessage.js
@@ -36,7 +36,7 @@ export default class EditHistoryMessage extends React.PureComponent {
     static propTypes = {
         // the message event being edited
         mxEvent: PropTypes.instanceOf(MatrixEvent).isRequired,
-        previousEdit: PropTypes.instanceOf(MatrixEvent).isRequired,
+        previousEdit: PropTypes.instanceOf(MatrixEvent),
         isBaseEvent: PropTypes.bool,
     };