diff --git a/include/Unknown/UnkStruct_ov000_020e2f04.hpp b/include/Unknown/UnkStruct_ov000_020e2f04.hpp
index 74739291..b62ae550 100644
--- a/include/Unknown/UnkStruct_ov000_020e2f04.hpp
+++ b/include/Unknown/UnkStruct_ov000_020e2f04.hpp
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <nds/math.H>
+#include <nds/math.h>
 
 #include "Physics/AABB.hpp"
 #include "global.h"