diff --git a/mach/vax4/libem/fat.s b/mach/vax4/libem/fat.s
index 9543b23c6..7c9d211c4 100644
--- a/mach/vax4/libem/fat.s
+++ b/mach/vax4/libem/fat.s
@@ -6,5 +6,5 @@
 .fat:
 	pushl	(sp)
 	jsb	.trp
-	calls	$1,__exit
-	halt
+	movl	(sp)+,r0
+	jmp	EXIT
diff --git a/mach/vax4/libem/print.s b/mach/vax4/libem/print.s
index 50c225598..4075ba08a 100644
--- a/mach/vax4/libem/print.s
+++ b/mach/vax4/libem/print.s
@@ -19,7 +19,7 @@ printc:
 	pushl	$1
 	pushab	Ich
 	pushl	$2
-	calls	$3,__write
+	calls	$3,WRITE
 	rsb
 
 	.sect .data
diff --git a/mach/vax4/libem/strhp.s b/mach/vax4/libem/strhp.s
index 277b268be..41e2e9143 100644
--- a/mach/vax4/libem/strhp.s
+++ b/mach/vax4/libem/strhp.s
@@ -15,7 +15,7 @@
 	addl2   $02000,r0
 	bicl2   $0777,r0
 	pushl	r0
-	calls	$1,__brk
+	calls	$1,BRK
 	tstl	r0
 	beql	I2
 	pushl	$EHEAP
diff --git a/mach/vax4/libem/trp.s b/mach/vax4/libem/trp.s
index 622fe4c5f..d1cf14810 100644
--- a/mach/vax4/libem/trp.s
+++ b/mach/vax4/libem/trp.s
@@ -37,7 +37,7 @@ I3:
 	pushl	$Iemesend-Iemes
 	pushab	Iemes
 	pushl	$2
-	calls	$3,__write
+	calls	$3,WRITE
 	bpt
 .sect .data
 Iemes: