diff --git a/source/fatfs/ff.c b/source/fatfs/ff.c
index 3d0d976..b398e87 100644
--- a/source/fatfs/ff.c
+++ b/source/fatfs/ff.c
@@ -3674,7 +3674,7 @@ FRESULT f_sync (
 	FATFS *fs;
 	DWORD tm;
 	BYTE *dir;
-	DEF_NAMBUF
+	// DEF_NAMBUF
 
 
 	res = validate(&fp->obj, &fs);	/* Check validity of the file object */