diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3fc7a8a0d8e3..89ff9df35095 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -21426,9 +21426,7 @@ in
 
   inherit (ocamlPackages) stog;
 
-  stp = callPackage ../applications/science/logic/stp {
-    bison = bison2;
-  };
+  stp = callPackage ../applications/science/logic/stp { };
 
   stretchly = callPackage ../applications/misc/stretchly {
     inherit (gnome2) GConf;