diff --git a/library/std/src/sys/unix/process/process_unix.rs b/library/std/src/sys/unix/process/process_unix.rs
index 59ed4fc4ea4f..11d23a328900 100644
--- a/library/std/src/sys/unix/process/process_unix.rs
+++ b/library/std/src/sys/unix/process/process_unix.rs
@@ -168,6 +168,8 @@ fn clone3(cl_args: *mut clone_args, len: libc::size_t) -> libc::c_long
 
         // Bypassing libc for `clone3` can make further libc calls unsafe,
         // so we use it sparingly for now. See #89522 for details.
+        // Some tools (e.g. sandboxing tools) may also expect `fork`
+        // rather than `clone3`.
         let want_clone3 = self.get_create_pidfd();
 
         // If we fail to create a pidfd for any reason, this will