diff --git a/components/post_view/index.js b/components/post_view/index.js
index ad0270cdd235..fc7c7952cbe8 100644
--- a/components/post_view/index.js
+++ b/components/post_view/index.js
@@ -27,7 +27,7 @@ function makeMapStateToProps() {
         }
 
         return {
-            channel: getChannel(state, ownProps.channelId),
+            channel: getChannel(state, ownProps.channelId) || {},
             lastViewedAt: state.views.channel.lastChannelViewTime[ownProps.channelId],
             posts,
             postVisibility: state.views.channel.postVisibility[ownProps.channelId],
diff --git a/components/post_view/post_list.jsx b/components/post_view/post_list.jsx
index 6d542c048b7b..a6bc74e0eb69 100644
--- a/components/post_view/post_list.jsx
+++ b/components/post_view/post_list.jsx
@@ -60,7 +60,7 @@ export default class PostList extends React.PureComponent {
         /**
          * Set to focus this post
          */
-        focusedPostId: PropTypes.array,
+        focusedPostId: PropTypes.string,
 
         /**
          * Whether to display the channel intro at full width