diff --git a/mach/m68k4/libsys/head_em.s b/mach/m68k4/libsys/head_em.s
index 3964e620a..3e4527be9 100644
--- a/mach/m68k4/libsys/head_em.s
+++ b/mach/m68k4/libsys/head_em.s
@@ -1,5 +1,5 @@
 .define .lino,.filn
-.define EXIT
+.define EXIT,WRITE,BRK
 .define	begtext,begdata,begbss
 .define	EARRAY,ERANGE,ESET,EIDIVZ,EHEAP,EILLINS,ECASE,EBADGTO
 .define	hol0,.reghp,.limhp,.trpim,.trppc
@@ -56,6 +56,10 @@ EXIT:
 	move.l	d0,-(sp)
 	jsr	__exit
 
+WRITE:	jmp	__write
+
+BRK:	jmp	__brk
+
 	.sect .data
 begdata:
 hol0: