diff --git a/Doc/lib/libdifflib.tex b/Doc/lib/libdifflib.tex
index acb5ed1c31b..7fb8e920dd4 100644
--- a/Doc/lib/libdifflib.tex
+++ b/Doc/lib/libdifflib.tex
@@ -302,7 +302,7 @@ emu
 
 
 \begin{seealso}
-  \seetitle[http://www.ddj.com/documents/s=1103/ddj8807c/]
+  \seetitle[http://www.ddj.com/184407970?pgno=5]
            {Pattern Matching: The Gestalt Approach}{Discussion of a
             similar algorithm by John W. Ratcliff and D. E. Metzener.
             This was published in