diff --git a/pkgs/development/tools/parsing/byacc/default.nix b/pkgs/development/tools/parsing/byacc/default.nix
index f3ec8225f1ca..8842c8723b1e 100644
--- a/pkgs/development/tools/parsing/byacc/default.nix
+++ b/pkgs/development/tools/parsing/byacc/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   name = "byacc-1.9";
 
   src = fetchurl {
-    url = http://invisible-island.net/datafiles/release/byacc.tar.gz;
+    url = ftp://invisible-island.net/byacc/byacc-20140715.tgz;
     sha256 = "1rbzx5ipkvih9rjfdfv6310wcr6mxjbdlsh9zcv5aaz6yxxxil7c";
   };