diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f7f5de01c63..8b4c5f62e54 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2867,7 +2867,7 @@ let
     cross = assert crossSystem != null; crossSystem;
   });
 
-  bison = bison25;
+  bison = bison26;
 
   bison1875 = callPackage ../development/tools/parsing/bison/bison-1.875.nix { };