diff --git a/include/System/OverlayManager.hpp b/include/System/OverlayManager.hpp
index fe9a3e63..e56ea58e 100644
--- a/include/System/OverlayManager.hpp
+++ b/include/System/OverlayManager.hpp
@@ -394,5 +394,5 @@ class OverlayManager {
 };
 
 extern OverlayManager gOverlayManager;
-extern OverlayIndex data_0203e0e8[OverlayIndex_COUNT];
+extern OverlayId data_0203e0e8[OverlayIndex_COUNT];
 extern char* data_02043c88[OverlayIndex_COUNT];