diff --git a/arm9/source/fat/ff.h b/arm9/source/fat/ff.h
index ab19b6c..a6ab2c5 100644
--- a/arm9/source/fat/ff.h
+++ b/arm9/source/fat/ff.h
@@ -57,8 +57,6 @@ typedef unsigned short	WCHAR;	/* 16-bit unsigned integer */
 typedef unsigned long	DWORD;	/* 32-bit unsigned integer */
 #endif
 
-#include "math.h"
-
 /* Definitions of volume management */
 
 #if FF_MULTI_PARTITION		/* Multiple partition configuration */