diff --git a/contracts/core/BasePaymaster.sol b/contracts/core/BasePaymaster.sol
index c7a2b638..4e29e234 100644
--- a/contracts/core/BasePaymaster.sol
+++ b/contracts/core/BasePaymaster.sol
@@ -74,7 +74,7 @@ abstract contract BasePaymaster is IPaymaster, Ownable2Step {
      *                        opReverted  - User op reverted. The paymaster still has to pay for gas.
      *                        postOpReverted - never passed in a call to postOp().
      * @param context       - The context value returned by validatePaymasterUserOp
-     * @param actualGasCost - Actual gas used so far (without this postOp call).
+     * @param actualGasCost - Actual cost of gas used so far (without this postOp call).
      * @param actualUserOpFeePerGas - the gas price this UserOp pays. This value is based on the UserOp's maxFeePerGas
      *                        and maxPriorityFee (and basefee)
      *                        It is not the same as tx.gasprice, which is what the bundler pays.