diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c7d94b68233..3e131ffca29 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5054,6 +5054,7 @@ let
 
   linux_2_6_25 = makeOverridable (import ../os-specific/linux/kernel/linux-2.6.25.nix) {
     inherit fetchurl perl mktemp module_init_tools;
+    extraConfig = "KMOD y";
     stdenv = overrideInStdenv stdenv [gnumake381];
     kernelPatches =
       [ kernelPatches.fbcondecor_2_6_25