diff --git a/erpnext/assets/doctype/asset_depreciation_schedule/deppreciation_schedule_controller.py b/erpnext/assets/doctype/asset_depreciation_schedule/deppreciation_schedule_controller.py
index 277b12cfc5c..c66dee29e2a 100644
--- a/erpnext/assets/doctype/asset_depreciation_schedule/deppreciation_schedule_controller.py
+++ b/erpnext/assets/doctype/asset_depreciation_schedule/deppreciation_schedule_controller.py
@@ -258,7 +258,11 @@ class DepreciationScheduleController(StraightLineMethod, WDVMethod):
 	def get_total_pending_days_or_years(self):
 		if cint(frappe.db.get_single_value("Accounts Settings", "calculate_depr_using_total_days")):
 			last_depr_date = self.get_last_booked_depreciation_date()
-			self.total_pending_days = date_diff(self.final_schedule_date, last_depr_date) + 1
+			if last_depr_date:
+				self.total_pending_days = date_diff(self.final_schedule_date, last_depr_date) + 1
+			self.total_pending_days = date_diff(
+				self.final_schedule_date, self.asset_doc.available_for_use_date
+			)
 		else:
 			self.total_pending_years = self.pending_months / 12
 
diff --git a/erpnext/assets/doctype/asset_depreciation_schedule/test_asset_depreciation_schedule.py b/erpnext/assets/doctype/asset_depreciation_schedule/test_asset_depreciation_schedule.py
index 61e3761719e..a4f761bfb75 100644
--- a/erpnext/assets/doctype/asset_depreciation_schedule/test_asset_depreciation_schedule.py
+++ b/erpnext/assets/doctype/asset_depreciation_schedule/test_asset_depreciation_schedule.py
@@ -41,6 +41,7 @@ class TestAssetDepreciationSchedule(IntegrationTestCase):
 		self.assertRaises(frappe.ValidationError, second_asset_depr_schedule.insert)
 
 	def test_daily_prorata_based_depr_on_sl_method(self):
+		frappe.db.set_single_value("Accounts Settings", "calculate_depr_using_total_days", 0)
 		asset = create_asset(
 			calculate_depreciation=1,
 			depreciation_method="Straight Line",