diff --git a/src/runtime/sys_plan9_386.s b/src/runtime/sys_plan9_386.s
index 13ead5d..b9db8cb 100644
--- a/src/runtime/sys_plan9_386.s
+++ b/src/runtime/sys_plan9_386.s
@@ -148,7 +148,8 @@
 	MOVL	AX, (g_stack+stack_hi)(DX)
 	SUBL	$(64*1024), AX		// stack size
 	MOVL	AX, (g_stack+stack_lo)(DX)
-	MOVL	AX, g_stackguard(DX)
+	MOVL	AX, g_stackguard0(DX)
+	MOVL	AX, g_stackguard1(DX)
 
 	// Initialize procid from TOS struct.
 	MOVL	_tos(SB), AX