diff --git a/source/ff.h b/source/ff.h
index fc4bef926dd30598eeaa032d9a6f81c5088b4652..4a74f247b0d7763415ba50737b22fa3c9a7fb9be 100644
--- a/source/ff.h
+++ b/source/ff.h
@@ -374,9 +374,6 @@ typedef struct {
 #endif
 } DIR_FILE;
 
-#define MAX(a, b, c)	(c = (a > b) ? a : b)
-#define MIN(a, b, c)	(c = (a < b) ? a : b)
-
 /* File function return code (FRESULT) */
 
 typedef enum {