diff --git a/mach/sparc/libem/shp.s b/mach/sparc/libem/shp.s
index 9e5950554..cc07c3d79 100644
--- a/mach/sparc/libem/shp.s
+++ b/mach/sparc/libem/shp.s
@@ -7,7 +7,7 @@ strhp:				! %o0 = new heap pointer
 	st	%i0, [%o1]	! it'll probably go right, anyway
 	set	limhp, %o1
 	ld	[%o1], %o2
-	cmp	%i0, limhp
+	cmp	%i0, %o2
 	blt	1f
 	nop
 	add	%i0, 0x400, %i0	! extra 1K