diff --git a/Signal/src/ViewControllers/ConversationView/ConversationViewController.m b/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
index 339badae1..44a494465 100644
--- a/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
+++ b/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
@@ -4163,6 +4163,7 @@ typedef enum : NSUInteger {
 
     [self updateLastVisibleTimestamp];
     self.conversationStyle.viewWidth = self.collectionView.width;
+    [self.collectionView.collectionViewLayout invalidateLayout];
 }
 
 #pragma mark - View Items