diff --git a/pkgs/applications/science/logic/ltl2ba/default.nix b/pkgs/applications/science/logic/ltl2ba/default.nix
index f33152a8767c..c77e0327fb6b 100644
--- a/pkgs/applications/science/logic/ltl2ba/default.nix
+++ b/pkgs/applications/science/logic/ltl2ba/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "ltl2ba-${version}";
-  version = "1.2b1";
+  version = "1.2";
 
   src = fetchurl {
     url    = "http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/${name}.tar.gz";
-    sha256 = "1f4jnkfkyj8lcc5qfqbiypfc11rhhpqqi6xs9xx5dysg6r6303wm";
+    sha256 = "0vzv5g7v87r41cvdafxi6yqnk7glzxrzgavy8213k59f6v11dzlx";
   };
 
   hardeningDisable = [ "format" ];