diff --git a/db/post_migrate/20170104150317_requeue_pending_delete_projects.rb b/db/post_migrate/20170104150317_requeue_pending_delete_projects.rb
index c2265858000adc358f50a27ca41f104527709dab..f399950bd5e4981e214b31bc0068b922dccc6d82 100644
--- a/db/post_migrate/20170104150317_requeue_pending_delete_projects.rb
+++ b/db/post_migrate/20170104150317_requeue_pending_delete_projects.rb
@@ -41,6 +41,7 @@ class RequeuePendingDeleteProjects < ActiveRecord::Migration
     projects = Arel::Table.new(:projects)
     projects.project(projects[:id]).
       where(projects[:pending_delete].eq(true)).
+      where(projects[:namespace_id].not_eq(nil)).
       skip(@offset * BATCH_SIZE).
       take(BATCH_SIZE).
       to_sql