diff --git a/man2/select.2 b/man2/select.2 index e3f1d4d67..c34689624 100644 --- a/man2/select.2 +++ b/man2/select.2 @@ -319,8 +319,9 @@ return the number of file descriptors contained in the three returned descriptor sets (that is, the total number of bits that are set in .IR readfds , .IR writefds , -.IR exceptfds ) -which may be zero if the timeout expires before anything interesting happens. +.IR exceptfds ). +The return value may be zero if the timeout expired before any +file descriptors became ready. .PP On error, \-1 is returned, and .I errno