Fix a mistake.
diff --git a/Doc/lib/libctypes.tex b/Doc/lib/libctypes.tex
index 4577358..6206b8c 100755
--- a/Doc/lib/libctypes.tex
+++ b/Doc/lib/libctypes.tex
@@ -151,9 +151,9 @@
\code{ctypes} tries to protect you from calling functions with the wrong
number of arguments or the wrong calling convention. Unfortunately
-this only works on Windows, for \code{stdcall} functions. It does this
-by examining the stack after the function returns, so although an
-error is raised the function \emph{has} been called:
+this only works on Windows. It does this by examining the stack after
+the function returns, so although an error is raised the function
+\emph{has} been called:
\begin{verbatim}
>>> windll.kernel32.GetModuleHandleA() # doctest: +WINDOWS
Traceback (most recent call last):