diff --git a/contracts/base/Dispatcher.sol b/contracts/base/Dispatcher.sol
index 2573392a..888637ab 100644
--- a/contracts/base/Dispatcher.sol
+++ b/contracts/base/Dispatcher.sol
@@ -240,11 +240,7 @@ abstract contract Dispatcher is Payments, V2SwapRouter, V3SwapRouter, V4SwapRout
                     _checkV3PositionManagerCall(inputs, msgSender());
                     (success, output) = address(V3_POSITION_MANAGER).call(inputs);
                 } else if (command == Commands.V4_INITIALIZE_POOL) {
-                    bytes4 selector;
-                    assembly {
-                        selector := calldataload(inputs.offset)
-                    }
-                    _checkV4Initialize(selector);
+                    _checkV4InitializeCall(inputs);
                     (success, output) = address(V4_POSITION_MANAGER).call(inputs);
                 } else if (command == Commands.V4_POSITION_CALL) {
                     // should only call modifyLiquidities() to mint
diff --git a/contracts/modules/V3ToV4Migrator.sol b/contracts/modules/V3ToV4Migrator.sol
index 53154093..d5ea84da 100644
--- a/contracts/modules/V3ToV4Migrator.sol
+++ b/contracts/modules/V3ToV4Migrator.sol
@@ -68,7 +68,11 @@ abstract contract V3ToV4Migrator is MigratorImmutables {
         }
     }
 
-    function _checkV4Initialize(bytes4 selector) internal pure {
+    function _checkV4InitializeCall(bytes calldata inputs) internal pure {
+        bytes4 selector;
+        assembly {
+            selector := calldataload(inputs.offset)
+        }
         if (selector != PoolInitializer.initializePool.selector) {
             revert InvalidAction(selector);
         }