diff --git a/sys/contrib/openzfs/lib/libzutil/os/freebsd/zutil_compat.c b/sys/contrib/openzfs/lib/libzutil/os/freebsd/zutil_compat.c
index 3e70fef1ec3d..baaf4b598ab1 100644
--- a/sys/contrib/openzfs/lib/libzutil/os/freebsd/zutil_compat.c
+++ b/sys/contrib/openzfs/lib/libzutil/os/freebsd/zutil_compat.c
@@ -1,124 +1,124 @@
 /*
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
  * Common Development and Distribution License (the "License").
  * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
  * See the License for the specific language governing permissions
  * and limitations under the License.
  *
  * When distributing Covered Code, include this CDDL HEADER in each
  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  * If applicable, add the following below this CDDL HEADER, with the
  * fields enclosed by brackets "[]" replaced with your own identifying
  * information: Portions Copyright [yyyy] [name of copyright owner]
  *
  * CDDL HEADER END
  */
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/sysctl.h>
 #include <sys/zfs_ioctl.h>
 #include <os/freebsd/zfs/sys/zfs_ioctl_compat.h>
 #include <libzutil.h>
 
 #include <err.h>
 
 int zfs_ioctl_version = ZFS_IOCVER_UNDEF;
 
 /*
  * Get zfs_ioctl_version
  */
 static int
 get_zfs_ioctl_version(void)
 {
 	size_t ver_size;
 	int ver = ZFS_IOCVER_NONE;
 
 	ver_size = sizeof (ver);
 	sysctlbyname("vfs.zfs.version.ioctl", &ver, &ver_size, NULL, 0);
 
 	return (ver);
 }
 
 static int
 zcmd_ioctl_compat(int fd, int request, zfs_cmd_t *zc, const int cflag)
 {
 	int newrequest, ret;
 	void *zc_c = NULL;
 	unsigned long ncmd;
 	zfs_iocparm_t zp;
 
 	switch (cflag) {
 	case ZFS_CMD_COMPAT_NONE:
 		ncmd = _IOWR('Z', request, zfs_iocparm_t);
-		zp.zfs_cmd = (uint64_t)zc;
+		zp.zfs_cmd = (uint64_t)(uintptr_t)zc;
 		zp.zfs_cmd_size = sizeof (zfs_cmd_t);
 		zp.zfs_ioctl_version = ZFS_IOCVER_OZFS;
 		break;
 	case ZFS_CMD_COMPAT_LEGACY:
 		newrequest = zfs_ioctl_ozfs_to_legacy(request);
 		ncmd = _IOWR('Z', newrequest, zfs_iocparm_t);
 		zc_c = malloc(sizeof (zfs_cmd_legacy_t));
 		zfs_cmd_ozfs_to_legacy(zc, zc_c);
-		zp.zfs_cmd = (uint64_t)zc_c;
+		zp.zfs_cmd = (uint64_t)(uintptr_t)zc_c;
 		zp.zfs_cmd_size = sizeof (zfs_cmd_legacy_t);
 		zp.zfs_ioctl_version = ZFS_IOCVER_LEGACY;
 		break;
 	default:
 		abort();
 		return (EINVAL);
 	}
 
 	ret = ioctl(fd, ncmd, &zp);
 	if (ret) {
 		if (zc_c)
 			free(zc_c);
 		return (ret);
 	}
 	if (zc_c) {
 		zfs_cmd_legacy_to_ozfs(zc_c, zc);
 		free(zc_c);
 	}
 	return (ret);
 }
 
 /*
  * This is FreeBSD version of ioctl, because Solaris' ioctl() updates
  * zc_nvlist_dst_size even if an error is returned, on FreeBSD if an
  * error is returned zc_nvlist_dst_size won't be updated.
  */
 int
 zfs_ioctl_fd(int fd, unsigned long request, zfs_cmd_t *zc)
 {
 	size_t oldsize;
 	int ret, cflag = ZFS_CMD_COMPAT_NONE;
 
 	if (zfs_ioctl_version == ZFS_IOCVER_UNDEF)
 		zfs_ioctl_version = get_zfs_ioctl_version();
 
 	switch (zfs_ioctl_version) {
 		case ZFS_IOCVER_LEGACY:
 			cflag = ZFS_CMD_COMPAT_LEGACY;
 			break;
 		case ZFS_IOCVER_OZFS:
 			cflag = ZFS_CMD_COMPAT_NONE;
 			break;
 		default:
 			errx(1, "unrecognized zfs ioctl version %d",
 			    zfs_ioctl_version);
 	}
 
 	oldsize = zc->zc_nvlist_dst_size;
 	ret = zcmd_ioctl_compat(fd, request, zc, cflag);
 
 	if (ret == 0 && oldsize < zc->zc_nvlist_dst_size) {
 		ret = -1;
 		errno = ENOMEM;
 	}
 
 	return (ret);
 }