diff --git a/docs/cmu-user/extensions.tex b/docs/cmu-user/extensions.tex
index 739e8fc9e1747194bd3aac9a64f68da106198615..e8df59ea88a639f8c208426d705999c7ad01d6eb 100644
--- a/docs/cmu-user/extensions.tex
+++ b/docs/cmu-user/extensions.tex
@@ -1909,21 +1909,21 @@ number of bits in the random integer.
 For floating-point numbers, this generator can by significantly faster 
 than the original generator.
 
-\subsection{MT-19987 Generator}
+\subsection{MT-19937 Generator}
 \cpsubindex{random number generation}{MT-19987 generator}
 On all platforms, this is the preferred generator as indicated by
-\kwd{rand-mt19987} being in \code{*features*}.  This is a Lisp
-implementation of the MT-19987 generator of Makoto Matsumoto and
+\kwd{rand-mt19937} being in \code{*features*}.  This is a Lisp
+implementation of the MT-19937 generator of Makoto Matsumoto and
 T. Nishimura.  We refer the reader to their paper\footnote{``Mersenne
   Twister: A 623-Dimensionally Equidistributed Uniform Pseudorandom
   Number Generator,'' ACM Trans. on Modeling and Computer Simulation,
   Vol. 8, No. 1, January 1998, pp.3--30} or to
 their
 \ifpdf
-\href{http://www.math.keio.ac.jp/~matumoto/emt.html}{website}.
+\href{http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html}{website}.
 \else
 website at
-\href{http://www.math.keio.ac.jp/~matumoto/emt.html}{\texttt{http://www.math.keio.ac.jp/~matumoto/emt.html}}.
+\href{http://www.math.keio.ac.jp/~matumoto/emt.html}{\texttt{http://www.math.keio.ac.jp/~matsumoto/emt.html}}.
 \fi
 
 \section{Lisp Threads}