diff --git a/man3/aio_return.3 b/man3/aio_return.3
index c2c428dbb..962f2389d 100644
--- a/man3/aio_return.3
+++ b/man3/aio_return.3
@@ -74,6 +74,11 @@ is not implemented.
 The
 .BR aio_return ()
 function is available since glibc 2.1.
+.SH ATTRIBUTES
+.SS Multithreading (see pthreads(7))
+The
+.BR aio_return ()
+function is thread-safe.
 .SH CONFORMING TO
 POSIX.1-2001, POSIX.1-2008.
 .SH EXAMPLE