diff --git a/pkgs/tools/text/sgml/openjade/default.nix b/pkgs/tools/text/sgml/openjade/default.nix
index 8b6307e8217..77532fd216c 100644
--- a/pkgs/tools/text/sgml/openjade/default.nix
+++ b/pkgs/tools/text/sgml/openjade/default.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation {
   name = "OpenJade-1.3.2";
 
   src = fetchurl {
-    url = "http://prdownloads.sourceforge.net/openjade/openjade-1.3.2.tar.gz";
+    url = "mirror://sourceforge/openjade/openjade-1.3.2.tar.gz";
     sha256 = "1l92sfvx1f0wmkbvzv1385y1gb3hh010xksi1iyviyclrjb7jb8x";
   };