diff --git a/src/Tstorish.sol b/src/Tstorish.sol
index e5566e3..0e59284 100644
--- a/src/Tstorish.sol
+++ b/src/Tstorish.sol
@@ -28,7 +28,7 @@ contract Tstorish {
     address private immutable _tloadTestContract;
 
     // Declare an immutable variable to store the initial TSTORE support status.
-    bool immutable _tstoreInitialSupport;
+    bool private immutable _tstoreInitialSupport;
 
     // Declare an immutable function type variable for the _setTstorish function
     // based on chain support for tstore at time of deployment.
@@ -248,4 +248,4 @@ contract Tstorish {
         // available gas, as all forwarded gas will be consumed on revert.
         (ok, ) = tloadTestContract.staticcall{ gas: gasleft() / 10 }("");
     }
-}
\ No newline at end of file
+}