diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c
index 2333867146df..28dd26741a86 100644
--- a/module/zfs/zfs_ioctl.c
+++ b/module/zfs/zfs_ioctl.c
@@ -3370,6 +3370,10 @@ zfs_unmount_snap(const char *snapname)
 	fullname = strdup(snapname);
 
 	err = zfs_sb_hold(dsname, FTAG, &zsb, B_FALSE);
+	if (zsb == NULL) {
+		err = 0;
+		goto out;
+	}
 	if (err != 0)
 		goto out;