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-rw-r--r--lib/libc/sys/select.23
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/libc/sys/select.2 b/lib/libc/sys/select.2
index 17fdbc4..2435e37 100644
--- a/lib/libc/sys/select.2
+++ b/lib/libc/sys/select.2
@@ -222,3 +222,6 @@ Thus, it is unwise to assume that the timeout value will be unmodified
by the
.Fn select
system call.
+.Fx
+does not modify the return value, which can cause problems for applications
+ported from other systems.
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