diff --git a/Doc/lib/libctypes.tex b/Doc/lib/libctypes.tex
index ed39ae8cd44..08a715dd74d 100755
--- a/Doc/lib/libctypes.tex
+++ b/Doc/lib/libctypes.tex
@@ -2113,7 +2113,7 @@ debugging; never modify the contents of this dictionary.
 \end{memberdesc}
 
 
-\subsubsection{Fundamental data types\label{ctypes-fundamental-data-types}}
+\subsubsection{Fundamental data types\label{ctypes-fundamental-data-types-2}}
 
 \begin{classdesc*}{_SimpleCData}
 This non-public class is the base class of all fundamental ctypes