diff --git a/app/models/user.rb b/app/models/user.rb
index 2594065a1..c12730dba 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -167,7 +167,7 @@ class User
     object = Diaspora::Parser.from_xml(xml)
     Rails.logger.debug("Receiving object:\n#{object.inspect}")
     Rails.logger.debug("From: #{object.person.inspect}") if object.person
-    object.person.save if object.is_a? Comment && Person.find_by_id(object.person_id).nil?
+    object.person.save if object.is_a?(Comment) && Person.find_by_id(object.person_id).nil?
     raise "In receive for #{self.real_name}, signature was not valid on: #{object.inspect}" unless object.signature_valid?
     if object.is_a? Retraction
       if object.type == 'Person' && object.signature_valid?