diff --git a/mach/vax4/libem/print.s b/mach/vax4/libem/print.s
index f80dd97ba..50c225598 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 557b2d691..277b268be 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 36715d347..622fe4c5f 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:
diff --git a/mach/vax4/libem/vars.s b/mach/vax4/libem/vars.s
index 2bc492332..cafb17430 100644
--- a/mach/vax4/libem/vars.s
+++ b/mach/vax4/libem/vars.s
@@ -12,4 +12,4 @@ hol0:
 .trpim:
         .data4   0
 .reghp:
-        .data4   _end
+        .data4   __end