diff --git a/contracts/orderbook/src/order.rs b/contracts/orderbook/src/order.rs
index 4bf72af..afb2a10 100644
--- a/contracts/orderbook/src/order.rs
+++ b/contracts/orderbook/src/order.rs
@@ -44,12 +44,13 @@ pub fn place_limit(
     // Verify the funds sent with the message match the `quantity` for the correct denom
     // We reject any quantity that is not exactly equal to the amount in the limit order being placed
     let received = must_pay(&info, &expected_denom)?;
+    let expected_amount = amount_to_value(order_direction, quantity, tick_to_price(tick_id)?)?;
     ensure_eq!(
         received,
-        quantity,
+        expected_amount,
         ContractError::InsufficientFunds {
             sent: received,
-            required: quantity,
+            required: expected_amount,
         }
     );