diff --git a/pkgs/os-specific/linux/kernel/2.6.21-ck.nix b/pkgs/os-specific/linux/kernel/2.6.21-ck.nix
index 6352d39edb1..0fb902c695e 100644
--- a/pkgs/os-specific/linux/kernel/2.6.21-ck.nix
+++ b/pkgs/os-specific/linux/kernel/2.6.21-ck.nix
@@ -2,7 +2,7 @@ args:
 (import ./2.6.21.nix)
 ( args //
   {
-      extraPatches = (if (args ? extraPatches) args.extraPatches else []) ++ 
+      extraPatches = (if (args ? extraPatches) then args.extraPatches else []) ++ 
       [
       {
         name = "Con Kolivas Patch";
diff --git a/pkgs/os-specific/linux/kernel/2.6.22-ck.nix b/pkgs/os-specific/linux/kernel/2.6.22-ck.nix
index 75352da8dbc..23a134cfc77 100644
--- a/pkgs/os-specific/linux/kernel/2.6.22-ck.nix
+++ b/pkgs/os-specific/linux/kernel/2.6.22-ck.nix
@@ -2,7 +2,7 @@ args:
 (import ./2.6.22.nix)
 ( args //
   {
-      extraPatches = (if (args ? extraPatches) args.extraPatches else []) ++ 
+      extraPatches = (if (args ? extraPatches) then args.extraPatches else []) ++ 
       [
       {
         name = "Con Kolivas Patch";