diff --git a/ArbOwner.sol b/ArbOwner.sol
index cf20dba..e6b6793 100644
--- a/ArbOwner.sol
+++ b/ArbOwner.sol
@@ -331,4 +331,8 @@ interface ArbOwner {
 
     /// Emitted when a successful call is made to this precompile
     event OwnerActs(bytes4 indexed method, address indexed owner, bytes data);
+
+    function setMaxStylusContractFragments(
+        uint64 maxFragments
+    ) external;
 }
diff --git a/ArbOwnerPublic.sol b/ArbOwnerPublic.sol
index fb5d11e..353f6bc 100644
--- a/ArbOwnerPublic.sol
+++ b/ArbOwnerPublic.sol
@@ -64,4 +64,6 @@ interface ArbOwnerPublic {
     function isCalldataPriceIncreaseEnabled() external view returns (bool);
 
     event ChainOwnerRectified(address rectifiedOwner);
+
+    function getMaxStylusContractFragments() external view returns (uint64);
 }