diff --git a/crates/driver/src/domain/competition/solution/mod.rs b/crates/driver/src/domain/competition/solution/mod.rs
index 7ee87238c9..e1bdfbb5cc 100644
--- a/crates/driver/src/domain/competition/solution/mod.rs
+++ b/crates/driver/src/domain/competition/solution/mod.rs
@@ -13,6 +13,7 @@ use {
             solver::Solver,
             Simulator,
         },
+        util::conv::u256::U256Ext,
     },
     futures::future::try_join_all,
     itertools::Itertools,
@@ -156,7 +157,7 @@ impl Solution {
                         .0
                         .checked_mul(uniform_prices.sell)
                         .ok_or(error::Math::Overflow)?
-                        .checked_div(uniform_prices.buy)
+                        .checked_ceil_div(&uniform_prices.buy)
                         .ok_or(error::Math::DivisionByZero)?,
                     order::Side::Buy => trade.executed().0,
                 },