diff --git a/pkgs/applications/window-managers/windowmaker/dockapps/wmsystemtray.nix b/pkgs/applications/window-managers/windowmaker/dockapps/wmsystemtray.nix
index c28d090e0bd..e7994eaf05f 100644
--- a/pkgs/applications/window-managers/windowmaker/dockapps/wmsystemtray.nix
+++ b/pkgs/applications/window-managers/windowmaker/dockapps/wmsystemtray.nix
@@ -3,7 +3,7 @@
 stdenv.mkDerivation {
   name = "wmsystemtray-1.4";
   src = fetchurl {
-     url = http://sourceforge.net/projects/wmsystemtray/files/wmsystemtray/wmsystemtray-1.4.tar.gz;
+     url = mirror://sourceforge/project/wmsystemtray/wmsystemtray/wmsystemtray-1.4.tar.gz;
      sha256 = "8edef43691e9fff071000e29166c7c1ad420c0956e9068151061e881c8ac97e9";
   };