diff --git a/pkgs/os-specific/linux/kernel/2.6.23.nix b/pkgs/os-specific/linux/kernel/2.6.23.nix
new file mode 100644
index 00000000000..ad06bc4f7eb
--- /dev/null
+++ b/pkgs/os-specific/linux/kernel/2.6.23.nix
@@ -0,0 +1,17 @@
+args:
+(import ./meta.nix)
+( args //
+  {
+    version = "2.6.23";
+    src_hash = { sha256 = "1nyv7004w40l4adzq2b0hrvk3f4iqwngkgrlh8as9cpz6l4prrnl"; };
+
+	systemPatches = [ ];
+
+    config = with args;
+      if kernelConfig != null then kernelConfig else
+      if userModeLinux then ./config-2.6.23.1-uml else
+      if stdenv.system == "i686-linux" then ./config-2.6.23.1-i686-smp else
+      if stdenv.system == "x86_64-linux" then ./config-2.6.23.1-x86_64-smp else
+      abort "No kernel configuration for your platform!";
+  }
+)
diff --git a/pkgs/os-specific/linux/kernel/default.nix b/pkgs/os-specific/linux/kernel/default.nix
index 115870b771e..36a7552352e 100644
--- a/pkgs/os-specific/linux/kernel/default.nix
+++ b/pkgs/os-specific/linux/kernel/default.nix
@@ -1,7 +1,7 @@
 args:
 let
   getValue = aSet: aName: default:
-  (if (aSet ? aName) then (builtins.getAttr aSet aName) else default);
+  (if (builtins.hasAttr aName aSet) then (builtins.getAttr aName aSet) else default);
 in
 
 let
@@ -25,5 +25,6 @@ args.stdenv.lib.listOfListsToAttrs [
   [ "2.6.21-ck" (import ./2.6.21-ck.nix newArgs) ]
   [ "2.6.22" (import ./2.6.22.nix newArgs) ]
   [ "2.6.22-ck" (import ./2.6.22-ck.nix newArgs) ]
+  [ "2.6.23" (import ./2.6.23.nix newArgs) ]
   [ "2.6.23.1" (import ./2.6.23.1.nix newArgs) ]
 ]
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index aba0a005846..781e1e9f165 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2788,7 +2788,7 @@ rec {
   # this creates a patch which can be applied to the kernel to integrate this module..
   kernel_module_acerhk = import ../os-specific/linux/kernel/acerhk {
     inherit fetchurl stdenv gnupatch;
-    kernel = kernel_2_6_21;
+    kernel = builtins.getAttr kernel "2.6.21";
     debug = true;
   };