diff --git a/app/screens/channel/channel_post_list/index.js b/app/screens/channel/channel_post_list/index.js
index f18570cf6..74705d22e 100644
--- a/app/screens/channel/channel_post_list/index.js
+++ b/app/screens/channel/channel_post_list/index.js
@@ -18,6 +18,7 @@ import ChannelPostList from './channel_post_list';
 function mapStateToProps(state) {
     const channelId = getCurrentChannelId(state);
     const channelRefreshingFailed = state.views.channel.retryFailed;
+    const currentChannelMember = getMyCurrentChannelMembership(state);
 
     return {
         channelId,
@@ -26,7 +27,7 @@ function mapStateToProps(state) {
         deviceHeight: state.device.dimension.deviceHeight,
         postIds: getPostIdsInCurrentChannel(state),
         postVisibility: state.views.channel.postVisibility[channelId],
-        lastViewedAt: getMyCurrentChannelMembership(state).last_viewed_at,
+        lastViewedAt: currentChannelMember && currentChannelMember.last_viewed_at,
         loadMorePostsVisible: state.views.channel.loadMorePostsVisible,
         refreshing: state.views.channel.refreshing,
         theme: getTheme(state),
diff --git a/app/screens/thread/thread.js b/app/screens/thread/thread.js
index 9c8b57022..aa678822d 100644
--- a/app/screens/thread/thread.js
+++ b/app/screens/thread/thread.js
@@ -66,7 +66,7 @@ export default class Thread extends PureComponent {
         }
 
         if (!this.state.lastViewedAt) {
-            this.setState({lastViewedAt: nextProps.myMember.last_viewed_at});
+            this.setState({lastViewedAt: nextProps.myMember && nextProps.myMember.last_viewed_at});
         }
     }
 
@@ -145,7 +145,7 @@ export default class Thread extends PureComponent {
                     renderFooter={this.renderFooter()}
                     indicateNewMessages={true}
                     postIds={postIds}
-                    currentUserId={myMember.user_id}
+                    currentUserId={myMember && myMember.user_id}
                     lastViewedAt={this.state.lastViewedAt}
                     navigator={navigator}
                 />