diff --git a/app/sweepers/friendship_sweeper.rb b/app/sweepers/friendship_sweeper.rb
index c165da7..39a1c62 100644
--- a/app/sweepers/friendship_sweeper.rb
+++ b/app/sweepers/friendship_sweeper.rb
@@ -13,8 +13,11 @@ class FriendshipSweeper < ActiveRecord::Observer
 protected
 
   def expire_caches(friendship)
-    expire_cache(friendship.person)
-    expire_cache(friendship.friend)
+    [friendship.person, friendship.friend].each do |profile|
+      if profile
+        expire_cache(profile)
+      end
+    end
   end
 
   def expire_cache(profile)
--
libgit2 0.21.2