diff --git a/db/migrate/20210312095840_add_index_to_adjustments.rb b/db/migrate/20210312095840_add_index_to_adjustments.rb
new file mode 100644
index 0000000000..1894ca3a0b
--- /dev/null
+++ b/db/migrate/20210312095840_add_index_to_adjustments.rb
@@ -0,0 +1,5 @@
+class AddIndexToAdjustments < ActiveRecord::Migration[5.0]
+  def change
+    add_index :spree_adjustments, :order_id
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 1a0045ba5e..9865cb2080 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -373,6 +373,7 @@ ActiveRecord::Schema.define(version: 20210312095840) do
     t.integer  "order_id"
     t.boolean  "included",                                             default: false
     t.index ["adjustable_id"], name: "index_adjustments_on_order_id", using: :btree
+    t.index ["order_id"], name: "index_spree_adjustments_on_order_id", using: :btree
   end
 
   create_table "spree_assets", force: :cascade do |t|