diff --git a/safe_eth/eth/clients/cowswap/cow_swap_api.py b/safe_eth/eth/clients/cowswap/cow_swap_api.py
index 05b35202c..12537de27 100644
--- a/safe_eth/eth/clients/cowswap/cow_swap_api.py
+++ b/safe_eth/eth/clients/cowswap/cow_swap_api.py
@@ -253,7 +253,10 @@ def get_estimated_amount(
             buyTokenBalance="erc20",  # `erc20` or `internal`
         )
 
-        quote = self.get_quote(order, NULL_ADDRESS)
+        quote = self.get_quote(
+            order,
+            ChecksumAddress(HexAddress(HexStr(self.settlement_contract_address))),
+        )
         if "quote" in quote:
             result = cast(Dict[str, Any], quote)
             return {