diff --git a/units/src/fee_rate.rs b/units/src/fee_rate.rs
index 970b5f875..e01a640a1 100644
--- a/units/src/fee_rate.rs
+++ b/units/src/fee_rate.rs
@@ -373,6 +373,13 @@ mod tests {
         let fee_rate = FeeRate::from_sat_per_vb(3).unwrap();
         let fee = fee_rate.checked_mul_by_weight(weight).unwrap();
         assert_eq!(Amount::from_sat(9), fee);
+
+        let weight = Weight::from_wu(381);
+        let fee_rate = FeeRate::from_sat_per_kwu(864);
+        let fee = fee_rate.checked_mul_by_weight(weight).unwrap();
+        // 381 * 0.864 yields 329.18.
+        // The result is then rounded up to 330.
+        assert_eq!(fee, Amount::from_sat(330));
     }
 
     #[test]