Improve and correct commentary to w32proc-related data and functions.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/w32.c b/src/w32.c
index 7eaa38716f9..50c81f88c72 100644
--- a/src/w32.c
+++ b/src/w32.c
@@ -6085,7 +6085,8 @@ sys_pipe (int * phandles)
 }
 
 /* Function to do blocking read of one byte, needed to implement
-   select.  It is only allowed on sockets and pipes. */
+   select.  It is only allowed on communication ports, sockets, or
+   pipes. */
 int
 _sys_read_ahead (int fd)
 {