--- fat.c
+++ fat.c
@@ -447,8 +447,8 @@
 		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);