diff --git a/erpnext/accounts/doctype/pos_invoice_item/pos_invoice_item.py b/erpnext/accounts/doctype/pos_invoice_item/pos_invoice_item.py
index 55a577b..44358c3 100644
--- a/erpnext/accounts/doctype/pos_invoice_item/pos_invoice_item.py
+++ b/erpnext/accounts/doctype/pos_invoice_item/pos_invoice_item.py
@@ -3,10 +3,10 @@
 
 
 # import frappe
-from frappe.model.document import Document
+from erpnext.accounts.doctype.sales_invoice_item.sales_invoice_item import SalesInvoiceItem
 
 
-class POSInvoiceItem(Document):
+class POSInvoiceItem(SalesInvoiceItem):
 	# begin: auto-generated types
 	# This code is auto-generated. Do not modify anything in this block.
 
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index abc0694..77cc53a 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -379,13 +379,7 @@
 
 	def validate_item_cost_centers(self):
 		for item in self.items:
-			cost_center_company = frappe.get_cached_value("Cost Center", item.cost_center, "company")
-			if cost_center_company != self.company:
-				frappe.throw(
-					_("Row #{0}: Cost Center {1} does not belong to company {2}").format(
-						frappe.bold(item.idx), frappe.bold(item.cost_center), frappe.bold(self.company)
-					)
-				)
+			item.validate_cost_center(self.company)
 
 	def validate_income_account(self):
 		for item in self.get("items"):
diff --git a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
index c71d08e..989a8ca 100644
--- a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
+++ b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
@@ -2,6 +2,8 @@
 # License: GNU General Public License v3. See license.txt
 
 
+import frappe
+from frappe import _
 from frappe.model.document import Document
 
 
@@ -92,4 +94,11 @@
 		weight_uom: DF.Link | None
 	# end: auto-generated types
 
-	pass
+	def validate_cost_center(self, company: str):
+		cost_center_company = frappe.get_cached_value("Cost Center", self.cost_center, "company")
+		if cost_center_company != company:
+			frappe.throw(
+				_("Row #{0}: Cost Center {1} does not belong to company {2}").format(
+					frappe.bold(self.idx), frappe.bold(self.cost_center), frappe.bold(company)
+				)
+			)