diff --git a/gnu/packages/chemistry.scm b/gnu/packages/chemistry.scm
index 68db903bab..2b3b5d7df6 100644
--- a/gnu/packages/chemistry.scm
+++ b/gnu/packages/chemistry.scm
@@ -148,7 +148,7 @@ (define-public domainfinder
      `(#:python ,python-2
        ;; No test suite
        #:tests? #f))
-    (home-page "http://dirac.cnrs-orleans.fr/DomainFinder")
+    (home-page "http://dirac.cnrs-orleans.fr/DomainFinder.html")
     (synopsis "Analysis of dynamical domains in proteins")
     (description "DomainFinder is an interactive program for the determination
 and characterization of dynamical domains in proteins.  It can infer dynamical