diff --git a/pep-0617.rst b/pep-0617.rst
index f0d580d40..8ace2e348 100644
--- a/pep-0617.rst
+++ b/pep-0617.rst
@@ -790,7 +790,7 @@ References
    http://pdos.csail.mit.edu/~baford/packrat/thesis
 
 .. [2] Medeiros et al.
-   https://arxiv.org/pdf/1509.02439v1.pdf
+   https://arxiv.org/pdf/1207.0443.pdf
 
 .. [3] Warth et al.
    http://web.cs.ucla.edu/~todd/research/pepm08.pdf