diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index 02e6e4c6524..b30a1db034d 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -618,12 +618,13 @@ class PurchaseInvoice(BuyingController):
 		frappe.db.set_value(self.doctype, self.name, "against_expense_account", self.against_expense_account)
 
 	def po_required(self):
-		if frappe.db.get_single_value("Buying Settings", "po_required") == "Yes":
-			if frappe.get_value(
+		if (
+			frappe.db.get_single_value("Buying Settings", "po_required") == "Yes"
+			and not self.is_internal_transfer()
+			and not frappe.get_value(
 				"Supplier", self.supplier, "allow_purchase_invoice_creation_without_purchase_order"
-			):
-				return
-
+			)
+		):
 			for d in self.get("items"):
 				if not d.purchase_order:
 					msg = _("Purchase Order Required for item {}").format(frappe.bold(d.item_code))