diff --git a/pep-0339.txt b/pep-0339.txt
index a4f736055..ea762e2f8 100644
--- a/pep-0339.txt
+++ b/pep-0339.txt
@@ -559,7 +559,7 @@ References
    213--227, 1997.
 
 .. _The Zephyr Abstract Syntax Description Language.:
-   http://www.cs.princeton.edu/~danwang/Papers/dsl97/dsl97.html
+    http://www.cs.princeton.edu/research/techreps/TR-554-97
 
 .. _SPARK: http://pages.cpsc.ucalgary.ca/~aycock/spark/