diff --git a/contracts/lib/Errors.sol b/contracts/lib/Errors.sol
index 787fa9299..e46eb9c1a 100644
--- a/contracts/lib/Errors.sol
+++ b/contracts/lib/Errors.sol
@@ -13,6 +13,11 @@ library Errors {
     error IPAccount__InvalidCalldata();
     error IPAccount__InvalidAccessController();
 
+    ////////////////////////////////////////////////////////////////////////////
+    //                          CoreMetadataModule                            //
+    ////////////////////////////////////////////////////////////////////////////
+    error CoreMetadataModule__ZeroAccessManager();
+
     ////////////////////////////////////////////////////////////////////////////
     //                                   Module                               //
     ////////////////////////////////////////////////////////////////////////////
diff --git a/contracts/modules/metadata/CoreMetadataModule.sol b/contracts/modules/metadata/CoreMetadataModule.sol
index c210a5987..18cdfa43b 100644
--- a/contracts/modules/metadata/CoreMetadataModule.sol
+++ b/contracts/modules/metadata/CoreMetadataModule.sol
@@ -50,6 +50,9 @@ contract CoreMetadataModule is
 
     /// @notice Initializes the CoreMetadataModule contract.
     function initialize(address accessManager) public initializer {
+        if (accessManager == address(0)) {
+            revert Errors.CoreMetadataModule__ZeroAccessManager();
+        }
         __AccessManaged_init(accessManager);
         __UUPSUpgradeable_init();
     }