diff --git a/Doc/lib/libarray.tex b/Doc/lib/libarray.tex
index 432a0f5..9db346d 100644
--- a/Doc/lib/libarray.tex
+++ b/Doc/lib/libarray.tex
@@ -223,7 +223,7 @@
   \seemodule{xdrlib}{Packing and unpacking of External Data
                      Representation (XDR) data as used in some remote
                      procedure call systems.}
-  \seetitle[http://numpy.sourceforge.net/numdoc/HTML/numdoc.html]{The
+  \seetitle[http://numpy.sourceforge.net/numdoc/HTML/numdoc.htm]{The
            Numerical Python Manual}{The Numeric Python extension
            (NumPy) defines another array type; see
            \url{http://numpy.sourceforge.net/} for further information