Doc fix.

diff --git a/src/dispnew.c b/src/dispnew.c
index d061f2ce9f148e969370c3dfda6e3f09c5e07c0e..1e50178b74b21afa6fed173bfdacb4fb316e6e00 100644 (file)
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -1936,6 +1936,7 @@ DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0,
   "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
 Optional second arg MILLISECONDS specifies an additional wait period, in\n\
 milliseconds.\n\
+\(Not all operating systems support milliseconds.)\n\
 Optional third arg non-nil means don't redisplay, just wait for input.\n\
 Redisplay is preempted as always if input arrives, and does not happen\n\
 if input is available before it starts.\n\