--- src/sys/platform/vkernel/i386/cpu_regs.c	2007/06/29 21:54:11	1.16
+++ src/sys/platform/vkernel/i386/cpu_regs.c	2007/07/01 01:11:36	1.17
@@ -525,7 +525,7 @@ sendupcall(struct vmupcall *vu, int more
 	 * context, switch back to the virtual kernel context before
 	 * trying to post the signal.
 	 */
-	if (lp->lwp_ve) {
+	if (lp->lwp_vkernel && lp->lwp_vkernel->ve) {
 		lp->lwp_md.md_regs->tf_trapno = 0;
 		vkernel_trap(lp, lp->lwp_md.md_regs);
 	}