diff --git a/library/std/src/os/unix/fs.rs b/library/std/src/os/unix/fs.rs
index caf6980afd91b..7c2c3f33d80b7 100644
--- a/library/std/src/os/unix/fs.rs
+++ b/library/std/src/os/unix/fs.rs
@@ -986,6 +986,11 @@ impl DirBuilderExt for fs::DirBuilder {
 /// Changing the group typically requires either being the owner and a member of the group, or
 /// having privileges.
 ///
+/// Be aware that changing owner clears the `suid` and `sgid` permission bits in most cases
+/// according to POSIX, usually even if the user is root. The sgid is not cleared when
+/// the file is non-group-executable. See: <https://www.man7.org/linux/man-pages/man2/chown.2.html>
+/// This call may also clear file capabilities, if there was any.
+///
 /// If called on a symbolic link, this will change the owner and group of the link target. To
 /// change the owner and group of the link itself, see [`lchown`].
 ///