diff --git a/gnu/packages/scheme.scm b/gnu/packages/scheme.scm
index aea8b54433..b438c3e90c 100644
--- a/gnu/packages/scheme.scm
+++ b/gnu/packages/scheme.scm
@@ -256,7 +256,8 @@ (define-public hop
                                      "-ldopt -Wl,-rpath," out "/lib")))))
         %standard-phases)
        #:tests? #f))                                ; no test suite
-    (inputs `(("bigloo" ,bigloo)
+    (inputs `(("avahi" ,avahi)
+              ("bigloo" ,bigloo)
               ("which" ,which)))
     (home-page "http://hop.inria.fr/")
     (synopsis "Multi-tier programming language for the Web 2.0")