diff -p -up mbootpack-0.4a/Makefile.orig mbootpack-0.4a/Makefile
--- mbootpack-0.4a/Makefile.orig	2009-10-08 12:05:12.000000000 -0400
+++ mbootpack-0.4a/Makefile	2009-10-08 12:06:08.000000000 -0400
@@ -42,11 +42,11 @@ clean: FRC
 	$(RM) mbootpack *.o *.d bootsect setup bzimage_header.c bin2c
 
 bootsect: bootsect.S
-	$(CC) $(CFLAGS) $(INCS) $(DEFS) -D__MB_ASM -c bootsect.S -o bootsect.o
+	$(CC) -m32 $(CFLAGS) $(INCS) $(DEFS) -D__MB_ASM -c bootsect.S -o bootsect.o
 	$(LD) -m elf_i386 -Ttext 0x0 -s --oformat binary bootsect.o -o $@
 
 setup: setup.S
-	$(CC) $(CFLAGS) $(INCS) $(DEFS) -D__MB_ASM -c setup.S -o setup.o
+	$(CC) -m32 $(CFLAGS) $(INCS) $(DEFS) -D__MB_ASM -c setup.S -o setup.o
 	$(LD) -m elf_i386 -Ttext 0x0 -s --oformat binary setup.o -o $@
 
 bin2c: bin2c.o