diff --git a/module/os/freebsd/zfs/spa_os.c b/module/os/freebsd/zfs/spa_os.c
index 449c162481..1b9f1a4ec9 100644
--- a/module/os/freebsd/zfs/spa_os.c
+++ b/module/os/freebsd/zfs/spa_os.c
@@ -184,7 +184,7 @@ spa_import_rootpool(const char *name, bool checkpointrewind)
 	spa_t *spa;
 	vdev_t *rvd;
 	nvlist_t *config, *nvtop;
-	char *pname;
+	const char *pname;
 	int error;
 
 	/*
diff --git a/module/os/freebsd/zfs/vdev_geom.c b/module/os/freebsd/zfs/vdev_geom.c
index fef6a1b88e..196d67b4b5 100644
--- a/module/os/freebsd/zfs/vdev_geom.c
+++ b/module/os/freebsd/zfs/vdev_geom.c
@@ -543,7 +543,7 @@ process_vdev_config(nvlist_t ***configs, uint64_t *count, nvlist_t *cfg,
 	uint64_t pool_guid;
 	uint64_t vdev_guid;
 	uint64_t id, txg, known_txg;
-	char *pname;
+	const char *pname;
 
 	if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &pname) != 0 ||
 	    strcmp(pname, name) != 0)
diff --git a/module/os/freebsd/zfs/zfs_ioctl_os.c b/module/os/freebsd/zfs/zfs_ioctl_os.c
index 7f7e2b72c5..8f44cced5d 100644
--- a/module/os/freebsd/zfs/zfs_ioctl_os.c
+++ b/module/os/freebsd/zfs/zfs_ioctl_os.c
@@ -99,7 +99,7 @@ zfs_ioc_nextboot(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
 	char name[MAXNAMELEN];
 	spa_t *spa;
 	vdev_t *vd;
-	char *command;
+	const char *command;
 	uint64_t pool_guid;
 	uint64_t vdev_guid;
 	int error;