--- src/sys/dev/disk/nata/atapi-cam.c	2008/02/10 00:01:02	1.9
+++ src/sys/dev/disk/nata/atapi-cam.c	2008/05/18 20:30:22	1.10
@@ -208,7 +208,7 @@ atapi_cam_attach(device_t dev)
     }
 
     if ((sim = cam_sim_alloc(atapi_action, atapi_poll, "ata",
-		 (void *)scp, unit, 1, 1, devq)) == NULL) {
+		 (void *)scp, unit, &sim_mplock, 1, 1, devq)) == NULL) {
 	error = ENOMEM;
 	goto out;
     }