diff --git a/app/controllers/scim_rails/scim_users_controller.rb b/app/controllers/scim_rails/scim_users_controller.rb
index 8209b12..fbc824f 100644
--- a/app/controllers/scim_rails/scim_users_controller.rb
+++ b/app/controllers/scim_rails/scim_users_controller.rb
@@ -109,7 +109,7 @@ module ScimRails
       end
 
       ScimRails.config.mutable_user_attributes.each do |attribute|
-        hash[attribute] = find_value_for(attribute)
+        hash[attribute] ||= find_value_for(attribute)
       end
       hash
     end
diff --git a/lib/scim_rails/version.rb b/lib/scim_rails/version.rb
index dfacebf..5b6334e 100644
--- a/lib/scim_rails/version.rb
+++ b/lib/scim_rails/version.rb
@@ -1,3 +1,3 @@
 module ScimRails
-  VERSION = "0.4.3"
+  VERSION = "0.4.4"
 end
--
libgit2 0.21.0