diff --git a/app/services/follow_service.rb b/app/services/follow_service.rb
index 4caf55078..2a9dc82c3 100644
--- a/app/services/follow_service.rb
+++ b/app/services/follow_service.rb
@@ -5,7 +5,7 @@ class FollowService < BaseService
   def call(source_account, uri)
     target_account = follow_remote_account_service.call(uri)
 
-    return nil if target_account.nil? || target_account.id == source_account.id
+    raise ActiveRecord::RecordNotFound if target_account.nil? || target_account.id == source_account.id
 
     follow = source_account.follow!(target_account)