diff --git a/packages/perennial/contracts/product/UPayoffProvider.sol b/packages/perennial/contracts/product/UPayoffProvider.sol
index 7b3b715a..e9d49ac7 100644
--- a/packages/perennial/contracts/product/UPayoffProvider.sol
+++ b/packages/perennial/contracts/product/UPayoffProvider.sol
@@ -12,6 +12,7 @@ import "../interfaces/types/PayoffDefinition.sol";
  * @notice Library for manage storing, surfacing, and upgrading a payoff provider.
  * @dev Uses an unstructured storage pattern to store the oracle address and payoff definition which allows this
         provider to be safely used with upgradeable contracts.
+        Perennial does not support 0-value payoffs.
  */
 abstract contract UPayoffProvider is IPayoffProvider, UInitializable {
     /// @dev The oracle contract address