diff --git a/sys/ufs/ffs/ffs_softdep.c b/sys/ufs/ffs/ffs_softdep.c
--- a/sys/ufs/ffs/ffs_softdep.c
+++ b/sys/ufs/ffs/ffs_softdep.c
@@ -15009,9 +15009,15 @@
 {
 	db_printf("mp %p (%s) devvp %p\n", ump->um_mountp,
 	    ump->um_mountp->mnt_stat.f_mntonname, ump->um_devvp);
-	db_printf("    fs %p su_wl %d su_deps %d su_req %d\n",
-	    ump->um_fs, ump->softdep_on_worklist,
-	    ump->softdep_deps, ump->softdep_req);
+	db_printf("    fs %p ", ump->um_fs);
+
+	if (ump->um_softdep != NULL) {
+		db_printf("su_wl %d su_deps %d su_req %d\n",
+		    ump->softdep_on_worklist, ump->softdep_deps,
+		    ump->softdep_req);
+	} else {
+		db_printf("su disabled\n");
+	}
 }
 
 static void