diff --git a/contracts/pool_stable/src/contract.rs b/contracts/pool_stable/src/contract.rs
index e0c32128..8d4becf8 100644
--- a/contracts/pool_stable/src/contract.rs
+++ b/contracts/pool_stable/src/contract.rs
@@ -963,7 +963,7 @@ pub fn compute_swap(
         env,
         amp as u128,
         scale_value(
-            offer_pool + convert_i128_to_u128(before_commission),
+            offer_pool + offer_amount,
             greatest_precision,
             DECIMAL_PRECISION,
         ),