diff --git a/libs/nds/include/nds/Overlay.h b/libs/nds/include/nds/overlay.h
similarity index 100%
rename from libs/nds/include/nds/Overlay.h
rename to libs/nds/include/nds/overlay.h
diff --git a/src/Main/System/OverlayManager.cpp b/src/Main/System/OverlayManager.cpp
index 8fff1fc6..5295fa2d 100644
--- a/src/Main/System/OverlayManager.cpp
+++ b/src/Main/System/OverlayManager.cpp
@@ -1,6 +1,6 @@
 #include "System/OverlayManager.hpp"
 #include "global.h"
-#include "nds/Overlay.h"
+#include "nds/overlay.h"
 
 struct UnkStruct_020ee698 {
     /* 00 */ unk8 mUnk_00[0x2C];