diff --git a/pkgs/development/tools/misc/libtool/default.nix b/pkgs/development/tools/misc/libtool/default.nix
index 9c8b4a78dbd..b955ccbc3c8 100644
--- a/pkgs/development/tools/misc/libtool/default.nix
+++ b/pkgs/development/tools/misc/libtool/default.nix
@@ -3,7 +3,7 @@
 stdenv.mkDerivation rec {
   name = "libtool-1.5.26";
   src = fetchurl {
-    url = "http://ftp.gnu.org/gnu/libtool/" + name + ".tar.gz";
+    url = "mirror://gnu/libtool/" + name + ".tar.gz";
     sha256 = "029ggq5kri1gjn6nfqmgw4w920gyfzscjjxbsxxidal5zqsawd8w";
   };
   buildInputs = [m4 perl];