--- mtools-3.9.9/fat.c.memset	2005-03-21 11:23:10.000000000 +0000
+++ mtools-3.9.9/fat.c	2005-03-21 11:23:36.000000000 +0000
@@ -437,8 +437,8 @@
 		InfoSector_t *infoSector;
 		infoSector = (InfoSector_t *) safe_malloc(This->sector_size);
 		set_dword(infoSector->signature1, INFOSECT_SIGNATURE1);
-		memset(infoSector->filler1, sizeof(infoSector->filler1),0);
-		memset(infoSector->filler2, sizeof(infoSector->filler2),0);
+		memset(infoSector->filler1, 0, sizeof(infoSector->filler1));
+		memset(infoSector->filler2, 0, sizeof(infoSector->filler2));
 		set_dword(infoSector->signature2, INFOSECT_SIGNATURE2);
 		set_dword(infoSector->pos, This->last);
 		set_dword(infoSector->count, This->freeSpace);