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-rw-r--r--Doc/lib/libos.tex2
1 files changed, 1 insertions, 1 deletions
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index 624fbf8..a8ceac8 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -257,7 +257,7 @@ Availability: \UNIX.
\begin{funcdesc}{getsid}{pid}
Calls the system call \cfunction{getsid()}. See the \UNIX{} manual
for the semantics.
-Availability: \UNIX.
+Availability: \UNIX. \versionadded{2.4}
\end{funcdesc}
\begin{funcdesc}{setsid}{}