diff --git a/india_compliance/gst_india/utils/e_invoice.py b/india_compliance/gst_india/utils/e_invoice.py
index a0ac1a976d..930a5e068d 100644
--- a/india_compliance/gst_india/utils/e_invoice.py
+++ b/india_compliance/gst_india/utils/e_invoice.py
@@ -511,8 +511,9 @@ def update_other_charges(self):
         """
         Non Taxable Value should be added to other charges.
         """
-        self.transaction_details.other_charges += self.rounded(
-            self.transaction_details.total_non_taxable_value
+        self.transaction_details.other_charges = self.rounded(
+            self.transaction_details.other_charges
+            + self.transaction_details.total_non_taxable_value
         )
 
     def validate_transaction(self):