diff --git a/erpnext/assets/doctype/asset/asset.py b/erpnext/assets/doctype/asset/asset.py
index 653fa66..0138a12 100644
--- a/erpnext/assets/doctype/asset/asset.py
+++ b/erpnext/assets/doctype/asset/asset.py
@@ -187,7 +187,7 @@
 				d.precision("rate_of_depreciation"))
 
 	def make_depreciation_schedule(self, date_of_sale):
-		if 'Manual' not in [d.depreciation_method for d in self.finance_books] and not self.schedules:
+		if 'Manual' not in [d.depreciation_method for d in self.finance_books] and not self.get('schedules'):
 			self.schedules = []
 
 		if not self.available_for_use_date: