diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 7522e92..8c03cb5 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -25,6 +25,7 @@
 from erpnext.selling.doctype.customer.customer import check_credit_limit
 from erpnext.setup.doctype.item_group.item_group import get_item_group_defaults
 from erpnext.stock.doctype.item.item import get_item_defaults
+from erpnext.stock.get_item_details import get_default_bom
 from erpnext.stock.stock_balance import get_reserved_qty, update_bin_qty
 
 form_grid_templates = {"items": "templates/form_grid/item_grid.html"}
@@ -423,8 +424,9 @@
 
 		for table in [self.items, self.packed_items]:
 			for i in table:
-				bom = get_default_bom_item(i.item_code)
+				bom = get_default_bom(i.item_code)
 				stock_qty = i.qty if i.doctype == "Packed Item" else i.stock_qty
+
 				if not for_raw_material_request:
 					total_work_order_qty = flt(
 						frappe.db.sql(
@@ -438,32 +440,19 @@
 					pending_qty = stock_qty
 
 				if pending_qty and i.item_code not in product_bundle_parents:
-					if bom:
-						items.append(
-							dict(
-								name=i.name,
-								item_code=i.item_code,
-								description=i.description,
-								bom=bom,
-								warehouse=i.warehouse,
-								pending_qty=pending_qty,
-								required_qty=pending_qty if for_raw_material_request else 0,
-								sales_order_item=i.name,
-							)
+					items.append(
+						dict(
+							name=i.name,
+							item_code=i.item_code,
+							description=i.description,
+							bom=bom or "",
+							warehouse=i.warehouse,
+							pending_qty=pending_qty,
+							required_qty=pending_qty if for_raw_material_request else 0,
+							sales_order_item=i.name,
 						)
-					else:
-						items.append(
-							dict(
-								name=i.name,
-								item_code=i.item_code,
-								description=i.description,
-								bom="",
-								warehouse=i.warehouse,
-								pending_qty=pending_qty,
-								required_qty=pending_qty if for_raw_material_request else 0,
-								sales_order_item=i.name,
-							)
-						)
+					)
+
 		return items
 
 	def on_recurring(self, reference_doc, auto_repeat_doc):
@@ -1167,13 +1156,6 @@
 	so.update_status(status)
 
 
-def get_default_bom_item(item_code):
-	bom = frappe.get_all("BOM", dict(item=item_code, is_active=True), order_by="is_default desc")
-	bom = bom[0].name if bom else None
-
-	return bom
-
-
 @frappe.whitelist()
 def make_raw_material_request(items, company, sales_order, project=None):
 	if not frappe.has_permission("Sales Order", "write"):
diff --git a/erpnext/selling/doctype/sales_order/test_sales_order.py b/erpnext/selling/doctype/sales_order/test_sales_order.py
index 96308f0..dfb8e0b 100644
--- a/erpnext/selling/doctype/sales_order/test_sales_order.py
+++ b/erpnext/selling/doctype/sales_order/test_sales_order.py
@@ -1380,6 +1380,59 @@
 		except Exception:
 			self.fail("Can not cancel sales order with linked cancelled payment entry")
 
+	def test_work_order_pop_up_from_sales_order(self):
+		"Test `get_work_order_items` in Sales Order picks the right BOM for items to manufacture."
+
+		from erpnext.controllers.item_variant import create_variant
+		from erpnext.manufacturing.doctype.production_plan.test_production_plan import make_bom
+
+		make_item(  # template item
+			"Test-WO-Tshirt",
+			{
+				"has_variant": 1,
+				"variant_based_on": "Item Attribute",
+				"attributes": [{"attribute": "Test Colour"}],
+			},
+		)
+		make_item("Test-RM-Cotton")  # RM for BOM
+
+		for colour in (
+			"Red",
+			"Green",
+		):
+			variant = create_variant("Test-WO-Tshirt", {"Test Colour": colour})
+			variant.save()
+
+		template_bom = make_bom(item="Test-WO-Tshirt", rate=100, raw_materials=["Test-RM-Cotton"])
+		red_var_bom = make_bom(item="Test-WO-Tshirt-R", rate=100, raw_materials=["Test-RM-Cotton"])
+
+		so = make_sales_order(
+			**{
+				"item_list": [
+					{
+						"item_code": "Test-WO-Tshirt-R",
+						"qty": 1,
+						"rate": 1000,
+						"warehouse": "_Test Warehouse - _TC",
+					},
+					{
+						"item_code": "Test-WO-Tshirt-G",
+						"qty": 1,
+						"rate": 1000,
+						"warehouse": "_Test Warehouse - _TC",
+					},
+				]
+			}
+		)
+		wo_items = so.get_work_order_items()
+
+		self.assertEqual(wo_items[0].get("item_code"), "Test-WO-Tshirt-R")
+		self.assertEqual(wo_items[0].get("bom"), red_var_bom.name)
+
+		# Must pick Template Item BOM for Test-WO-Tshirt-G as it has no BOM
+		self.assertEqual(wo_items[1].get("item_code"), "Test-WO-Tshirt-G")
+		self.assertEqual(wo_items[1].get("bom"), template_bom.name)
+
 	def test_request_for_raw_materials(self):
 		item = make_item(
 			"_Test Finished Item",
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index c8d9f54..3776a27 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -1352,12 +1352,22 @@
 
 @frappe.whitelist()
 def get_default_bom(item_code=None):
-	if item_code:
-		bom = frappe.db.get_value(
-			"BOM", {"docstatus": 1, "is_default": 1, "is_active": 1, "item": item_code}
+	def _get_bom(item):
+		bom = frappe.get_all(
+			"BOM", dict(item=item, is_active=True, is_default=True, docstatus=1), limit=1
 		)
-		if bom:
-			return bom
+		return bom[0].name if bom else None
+
+	if not item_code:
+		return
+
+	bom_name = _get_bom(item_code)
+
+	template_item = frappe.db.get_value("Item", item_code, "variant_of")
+	if not bom_name and template_item:
+		bom_name = _get_bom(template_item)
+
+	return bom_name
 
 
 @frappe.whitelist()