diff --git a/cmd/zfs/zfs_iter.c b/cmd/zfs/zfs_iter.c
index 301a179a2..7d1eae07c 100644
--- a/cmd/zfs/zfs_iter.c
+++ b/cmd/zfs/zfs_iter.c
@@ -267,9 +267,8 @@ zfs_list_only_by_fast(const zprop_list_t *p)
 	return (B_TRUE);
 }
 
-/* ARGSUSED */
 static int
-zfs_compare(const void *larg, const void *rarg, void *unused)
+zfs_compare(const void *larg, const void *rarg)
 {
 	zfs_handle_t *l = ((zfs_node_t *)larg)->zn_handle;
 	zfs_handle_t *r = ((zfs_node_t *)rarg)->zn_handle;
@@ -430,7 +429,7 @@ zfs_sort(const void *larg, const void *rarg, void *data)
 		}
 	}
 
-	return (zfs_compare(larg, rarg, NULL));
+	return (zfs_compare(larg, rarg));
 }
 
 int