diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4b4f916d0099..a0ad2ea28d3a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14761,6 +14761,7 @@ in
       inherit (kernel) version;
     };
     kernelPatches = kernel.kernelPatches ++ [ kernelPatches.tag_hardened ];
+    modDirVersionArg = kernel.modDirVersion + "-hardened";
   });
 
   linuxPackages_hardened = recurseIntoAttrs (hardenedLinuxPackagesFor pkgs.linux);