diff --git a/pkgs/development/tools/parsing/bison/bison-2.3.nix b/pkgs/development/tools/parsing/bison/bison-2.3.nix
index 63ae886c32f..4081f03cea8 100644
--- a/pkgs/development/tools/parsing/bison/bison-2.3.nix
+++ b/pkgs/development/tools/parsing/bison/bison-2.3.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
 
     homepage = http://www.gnu.org/software/bison/;
 
-    license = "GPLv3+";
+    license = "GPLv2+";
   };
 } // {
   glrSupport = true;