diff --git a/man3/aio_return.3 b/man3/aio_return.3
index 103e6be1a..a3ef26bd1 100644
--- a/man3/aio_return.3
+++ b/man3/aio_return.3
@@ -48,13 +48,17 @@ returns something other than
 .SH "RETURN VALUE"
 If the asynchronous I/O operation has completed, this function returns
 the value that would have been returned in case of a synchronous
-.IR read ,
-.IR write ,
+.BR read (2),
+.BR write (2),
+.BR fsync (2)
 or
-.I fsync
-request.
-Otherwise the return value is undefined.
-On error, the error value is returned.
+.BR fdatasync (2),
+call.
+
+If the asynchronous I/O operation has not yet completed,
+the return value and effect of
+.BR aio_return ()
+are undefined.
 .SH ERRORS
 .TP
 .B EINVAL