diff --git a/app/sweepers/friendship_sweeper.rb b/app/sweepers/friendship_sweeper.rb
index 39a1c62..f34de4c 100644
--- a/app/sweepers/friendship_sweeper.rb
+++ b/app/sweepers/friendship_sweeper.rb
@@ -7,7 +7,9 @@ class FriendshipSweeper < ActiveRecord::Observer
   end
 
   def after_destroy(friendship)
-    expire_cache(friendship.person)
+    if friendship.person
+      expire_cache(friendship.person)
+    end
   end
 
 protected
--
libgit2 0.21.2