diff --git a/lib/import_export/base_exporter.rb b/lib/import_export/base_exporter.rb
index 509266652c2..5a7f4a61956 100644
--- a/lib/import_export/base_exporter.rb
+++ b/lib/import_export/base_exporter.rb
@@ -14,7 +14,7 @@ module ImportExport
                    :public_admission, :membership_request_template, :messageable_level, :mentionable_level,
                    :members_visibility_level, :publish_read_state]
 
-    USER_ATTRS = [:id, :email, :username, :name, :created_at, :trust_level, :active, :last_emailed_at]
+    USER_ATTRS = [:id, :email, :username, :name, :created_at, :trust_level, :active, :last_emailed_at, :custom_fields]
 
     TOPIC_ATTRS = [:id, :title, :created_at, :views, :category_id, :closed, :archived, :archetype]