diff --git a/erpnext/assets/doctype/asset_depreciation_schedule/depreciation_methods.py b/erpnext/assets/doctype/asset_depreciation_schedule/depreciation_methods.py
index daa3f0b0918..1b235b1fa78 100644
--- a/erpnext/assets/doctype/asset_depreciation_schedule/depreciation_methods.py
+++ b/erpnext/assets/doctype/asset_depreciation_schedule/depreciation_methods.py
@@ -77,7 +77,7 @@ class StraightLineMethod(Document):
 class WDVMethod(Document):
 	@erpnext.allow_regional
 	def get_wdv_or_dd_depr_amount(self, row_idx):
-		return self.calculate_wdv_or_dd_based_depreciation_amount(row_idx)
+		return WDVMethod.calculate_wdv_or_dd_based_depreciation_amount(self, row_idx)
 
 	@staticmethod
 	def calculate_wdv_or_dd_based_depreciation_amount(self, row_idx):