diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
index e57c95fa5acb..18dbcda70cdb 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
@@ -195,12 +195,6 @@
 
 CTASSERT(sizeof(zfs_cmd_t) < IOCPARM_MAX);
 
-static int snapshot_list_prefetch;
-SYSCTL_DECL(_vfs_zfs);
-TUNABLE_INT("vfs.zfs.snapshot_list_prefetch", &snapshot_list_prefetch);
-SYSCTL_INT(_vfs_zfs, OID_AUTO, snapshot_list_prefetch, CTLFLAG_RW,
-    &snapshot_list_prefetch, 0, "Prefetch data when listing snapshots");
-
 static struct cdev *zfsdev;
 
 extern void zfs_init(void);