diff --git a/.changeset/fuzzy-chefs-wait.md b/.changeset/fuzzy-chefs-wait.md
new file mode 100644
index 0000000000..68ba41172e
--- /dev/null
+++ b/.changeset/fuzzy-chefs-wait.md
@@ -0,0 +1,5 @@
+---
+"@latticexyz/world": patch
+---
+
+Added explicit `internal` visibility to the `coreSystem` variable in `CoreModule`.
diff --git a/packages/world/src/modules/core/CoreModule.sol b/packages/world/src/modules/core/CoreModule.sol
index c897964c8f..c4ee5eb450 100644
--- a/packages/world/src/modules/core/CoreModule.sol
+++ b/packages/world/src/modules/core/CoreModule.sol
@@ -46,7 +46,7 @@ contract CoreModule is Module {
    * @dev Since the CoreSystem only exists once per World and writes to
    * known tables, we can deploy it once and register it in multiple Worlds.
    */
-  address immutable coreSystem = address(new CoreSystem());
+  address internal immutable coreSystem = address(new CoreSystem());
 
   /**
    * @notice Get the name of the module.