--- src/sys/dev/disk/ata/atapi-cam.c	2008/02/10 00:01:02	1.14
+++ src/sys/dev/disk/ata/atapi-cam.c	2008/05/18 20:30:22	1.15
@@ -126,7 +126,7 @@ atapi_cam_attach_bus(struct ata_channel
 
     devq = cam_simq_alloc(16);
     sim = cam_sim_alloc(atapi_action, atapi_poll, "ata", (void *)scp, 
-			unit, 1, 1, devq);
+			unit, &sim_mplock, 1, 1, devq);
     cam_simq_release(devq);
     if (sim == NULL)
 	goto error;