diff --git a/Formula/camlp5.rb b/Formula/camlp5.rb
index 71e134d3e9..5281acab53 100644
--- a/Formula/camlp5.rb
+++ b/Formula/camlp5.rb
@@ -4,6 +4,7 @@ class Camlp5 < Formula
   url "https://github.com/camlp5/camlp5/archive/rel707.tar.gz"
   version "7.07"
   sha256 "a2c493b833b217adf94d2000eb19015b990c4e441beb35cf36b1d33ed2351991"
+  revision 1
   head "https://gforge.inria.fr/anonscm/git/camlp5/camlp5.git"
 
   bottle do
@@ -22,8 +23,13 @@ class Camlp5 < Formula
   end
 
   test do
+    ocaml = Formula["ocaml"]
     (testpath/"hi.ml").write "print_endline \"Hi!\";;"
     assert_equal "let _ = print_endline \"Hi!\"",
-      shell_output("#{bin}/camlp5 #{lib}/ocaml/camlp5/pa_o.cmo #{lib}/ocaml/camlp5/pr_o.cmo hi.ml")
+      # The purpose of linking with the file "bigarray.cma" is to ensure that the
+      # ocaml files are in sync with the camlp5 files.  If camlp5 has been
+      # compiled with an older version of the ocaml compiler, then an error
+      # "interface mismatch" will occur.
+      shell_output("#{bin}/camlp5 #{lib}/ocaml/camlp5/pa_o.cmo #{lib}/ocaml/camlp5/pr_o.cmo #{ocaml.opt_lib}/ocaml/bigarray.cma hi.ml")
   end
 end