diff --git a/pkgs/development/libraries/hunspell/dictionaries.nix b/pkgs/development/libraries/hunspell/dictionaries.nix
index c26f6d3aa715..c7c07998f8b7 100644
--- a/pkgs/development/libraries/hunspell/dictionaries.nix
+++ b/pkgs/development/libraries/hunspell/dictionaries.nix
@@ -980,7 +980,7 @@ rec {
     readmeFile = "README";
 
     src = fetchurl {
-      url = "https://downloads.sourceforge.net/rospell/${fileName}";
+      url = "mirror://sourceforge/rospell/${fileName}";
       hash = "sha256-fxKNZOoGyeZxHDCxGMCv7vsBTY8zyS2szfRVq6LQRRk=";
     };