diff --git a/lang/ru.json b/lang/ru.json
index c76b1c32..db644176 100644
--- a/lang/ru.json
+++ b/lang/ru.json
@@ -1416,6 +1416,7 @@
       "tax_per_item": "Налог за единицу",
       "tax_name": "Название налога",
       "compound_tax": "Комплексный налог",
+      "compound_tax_description": "Calculated on the subtotal after discount plus all non-compound taxes.",
       "amount": "Amount",
       "percent": "Процент",
       "fixed_amount": "Fixed Amount",