diff --git a/sys/fs/cd9660/cd9660_vfsops.c b/sys/fs/cd9660/cd9660_vfsops.c
index 87657ab9e3c3..a1f8780b4607 100644
--- a/sys/fs/cd9660/cd9660_vfsops.c
+++ b/sys/fs/cd9660/cd9660_vfsops.c
@@ -369,6 +369,9 @@ iso_mountfs(devvp, mp)
 	pribp->b_flags |= B_AGE;
 	brelse(pribp);
 	pribp = NULL;
+	rootp = NULL;
+	pri = NULL;
+	pri_sierra = NULL;
 
 	mp->mnt_data = isomp;
 	mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
@@ -411,6 +414,7 @@ iso_mountfs(devvp, mp)
 		bp->b_flags |= B_AGE;
 		brelse(bp);
 		bp = NULL;
+		rootp = NULL;
 	}
 
 	if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) {
@@ -465,6 +469,7 @@ iso_mountfs(devvp, mp)
 	if (supbp) {
 		brelse(supbp);
 		supbp = NULL;
+		sup = NULL;
 	}
 
 	return 0;