2 files changed, 5 insertions, 4 deletions

diff --git a/src/s/irix6-5.h b/src/s/irix6-5.h
index 7e5a5505ee2..30aca2b5416 100644
--- a/src/s/irix6-5.h
+++ b/src/s/irix6-5.h
@@ -80,7 +80,7 @@ char *_getpty();
 
 #define NARROWPROTO 1
 
-#undef SA_RESTART
+#undef SA_RESTART     /* not the same as defining BROKEN_SA_RESTART */
 
 #undef TIOCSIGSEND              /* defined in usg5-4-common.h */
 
diff --git a/src/sysdep.c b/src/sysdep.c
index 475c977044b..0639b72285a 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -1484,9 +1484,10 @@ sys_signal (int signal_number, signal_handler_t action)
 #if defined (SA_RESTART)
   /* Emacs mostly works better with restartable system services. If this
      flag exists, we probably want to turn it on here.
-     However, on some systems this resets the timeout of `select'
-     which means that `select' never finishes if it keeps getting signals.
-     BROKEN_SA_RESTART is defined on those systems.  */
+     However, on some systems (only hpux11 at present) this resets the
+     timeout of `select' which means that `select' never finishes if
+     it keeps getting signals.
+     We define BROKEN_SA_RESTART on those systems.  */
   /* It's not clear why the comment above says "mostly works better".  --Stef
      When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
      for pending input so we need long-running syscalls to be interrupted