diff --git a/pkgs/development/ocaml-modules/batteries/default.nix b/pkgs/development/ocaml-modules/batteries/default.nix
index 904cb6327ce0..b7a80129451f 100644
--- a/pkgs/development/ocaml-modules/batteries/default.nix
+++ b/pkgs/development/ocaml-modules/batteries/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation {
   name = "ocaml-batteries-1.3.0";
 
   src = fetchurl {
-    url = "https://forge.ocamlcore.org/frs/download.php/560/batteries-1.3.0.tar.gz";
+    url = "http://forge.ocamlcore.org/frs/download.php/560/batteries-1.3.0.tar.gz";
     sha256 = "1kf8dyivigavi89lpsz7hzdv48as10yck7gkmqmnsnn1dps3m7an";
   };