--- src/sys/dev/disk/aha/aha.c	2008/02/10 00:01:02	1.19
+++ src/sys/dev/disk/aha/aha.c	2008/05/18 20:30:21	1.20
@@ -648,7 +648,7 @@ aha_attach(struct aha_softc *aha)
 	 * Construct our SIM entry
 	 */
 	aha->sim = cam_sim_alloc(ahaaction, ahapoll, "aha", aha, device_get_unit(aha->dev),
-				2, tagged_dev_openings, devq);
+				&sim_mplock, 2, tagged_dev_openings, devq);
 	cam_simq_release(devq);
 	if (aha->sim == NULL) {
 		return (ENOMEM);