diff --git a/Doc/lib/libwarnings.tex b/Doc/lib/libwarnings.tex
index e38da36..b7c7d63 100644
--- a/Doc/lib/libwarnings.tex
+++ b/Doc/lib/libwarnings.tex
@@ -153,7 +153,7 @@
 
 \begin{verbatim}
 def deprecation(message):
-    warnings.warn(message, DeprecationWarning, level=2)
+    warnings.warn(message, DeprecationWarning, stacklevel=2)
 \end{verbatim}
 
 This makes the warning refer to \function{deprecation()}'s caller,