diff --git a/mach/ns/libsys/head_em.s b/mach/ns/libsys/head_em.s
index 484b9c23..00ec9ac0 100644
--- a/mach/ns/libsys/head_em.s
+++ b/mach/ns/libsys/head_em.s
@@ -1,4 +1,4 @@
-.define hol0,argv,.reghp,envp,begbss
+.define hol0,argv,.reghp,.limhp,envp,begbss
 .define .ignmask, .trpreg
 .define .stop
 .define ERANGE,EILLINS,ECASE
@@ -47,6 +47,8 @@ envp:
 	.asciz 'PROGRAM'
 .reghp:
 	.data4 endbss
+.limhp:
+	.data4 endbss
 .ignmask:
 	.data2 0
 .trpreg: