diff --git a/packages/core/core-flows/src/cart/utils/prepare-confirm-inventory-input.ts b/packages/core/core-flows/src/cart/utils/prepare-confirm-inventory-input.ts
index 541c6a619513b..6b57ec9b048c8 100644
--- a/packages/core/core-flows/src/cart/utils/prepare-confirm-inventory-input.ts
+++ b/packages/core/core-flows/src/cart/utils/prepare-confirm-inventory-input.ts
@@ -90,6 +90,7 @@ export const prepareConfirmInventoryInput = (data: {
         allVariants.set(variants.id, {
           id: variants.id,
           manage_inventory: variants.manage_inventory,
+          allow_backorder: variants.allow_backorder,
         })
       }
     }
diff --git a/packages/core/core-flows/src/order/workflows/create-fulfillment.ts b/packages/core/core-flows/src/order/workflows/create-fulfillment.ts
index d49b5e00662d8..644df86bb23c1 100644
--- a/packages/core/core-flows/src/order/workflows/create-fulfillment.ts
+++ b/packages/core/core-flows/src/order/workflows/create-fulfillment.ts
@@ -225,6 +225,7 @@ export const createOrderFulfillmentWorkflow = createWorkflow(
         "currency_code",
         "items.*",
         "items.variant.manage_inventory",
+        "items.variant.allow_backorder",
         "shipping_address.*",
         "shipping_methods.shipping_option_id",
         "shipping_methods.data",
diff --git a/packages/core/core-flows/src/order/workflows/return/confirm-receive-return-request.ts b/packages/core/core-flows/src/order/workflows/return/confirm-receive-return-request.ts
index 3cd4f620215cd..78c6e4ae82026 100644
--- a/packages/core/core-flows/src/order/workflows/return/confirm-receive-return-request.ts
+++ b/packages/core/core-flows/src/order/workflows/return/confirm-receive-return-request.ts
@@ -148,7 +148,6 @@ export const confirmReturnReceiveWorkflow = createWorkflow(
         "canceled_at",
         "items.*",
         "items.item.variant_id",
-        "items.item.variant.id",
         "items.item.variant.manage_inventory",
         "items.item.variant.inventory_items.inventory_item_id",
         "items.item.variant.inventory_items.required_quantity",
diff --git a/packages/medusa/src/api/utils/middlewares/products/variant-inventory-quantity.ts b/packages/medusa/src/api/utils/middlewares/products/variant-inventory-quantity.ts
index cd7a7399fcbff..ee39c5b1715f1 100644
--- a/packages/medusa/src/api/utils/middlewares/products/variant-inventory-quantity.ts
+++ b/packages/medusa/src/api/utils/middlewares/products/variant-inventory-quantity.ts
@@ -24,6 +24,7 @@ export async function getVariantInventoryItems({
     fields: [
       "variant_id",
       "variant.manage_inventory",
+      "variant.allow_backorder",
       "required_quantity",
       "inventory.*",
       "inventory.location_levels.*",