diff --git a/cmd/zpool/os/freebsd/zpool_vdev_os.c b/cmd/zpool/os/freebsd/zpool_vdev_os.c
index 66bfe28f13..8ebd3e60d5 100644
--- a/cmd/zpool/os/freebsd/zpool_vdev_os.c
+++ b/cmd/zpool/os/freebsd/zpool_vdev_os.c
@@ -86,6 +86,7 @@ int
 check_device(const char *name, boolean_t force, boolean_t isspare,
     boolean_t iswholedisk)
 {
+	(void) iswholedisk;
 	char path[MAXPATHLEN];
 
 	if (strncmp(name, _PATH_DEV, sizeof (_PATH_DEV) - 1) != 0)
@@ -99,6 +100,7 @@ check_device(const char *name, boolean_t force, boolean_t isspare,
 boolean_t
 check_sector_size_database(char *path, int *sector_size)
 {
+	(void) path, (void) sector_size;
 	return (0);
 }
 
diff --git a/cmd/zpool/os/linux/zpool_vdev_os.c b/cmd/zpool/os/linux/zpool_vdev_os.c
index 10929fa65a..9d2c21c2a8 100644
--- a/cmd/zpool/os/linux/zpool_vdev_os.c
+++ b/cmd/zpool/os/linux/zpool_vdev_os.c
@@ -409,6 +409,7 @@ check_device(const char *path, boolean_t force,
 void
 after_zpool_upgrade(zpool_handle_t *zhp)
 {
+	(void) zhp;
 }
 
 int