diff --git a/Doc/lib/libtarfile.tex b/Doc/lib/libtarfile.tex
index 90884731893d..85cdeb87aee7 100644
--- a/Doc/lib/libtarfile.tex
+++ b/Doc/lib/libtarfile.tex
@@ -299,7 +299,7 @@ tar archive several times. Each archive member is represented by a
 \begin{memberdesc}{debug=0}
     To be set from \code{0} (no debug messages; the default) up to
     \code{3} (all debug messages). The messages are written to
-    \code{sys.stdout}.
+    \code{sys.stderr}.
 \end{memberdesc}
 
 \begin{memberdesc}{errorlevel}