diff --git a/pkgs/os-specific/linux/kernel-headers/2.6.28.nix b/pkgs/os-specific/linux/kernel-headers/2.6.28.nix
index 525538f7bf32..50ce58ff347b 100644
--- a/pkgs/os-specific/linux/kernel-headers/2.6.28.nix
+++ b/pkgs/os-specific/linux/kernel-headers/2.6.28.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation {
     else if stdenv.system == "powerpc-linux" then ["ppc"] else [];
 
   patchPhase = ''
-    patch --verbose -p1 "${./unifdef-getline.patch}"
+    patch --verbose -p1 < "${./unifdef-getline.patch}"
     sed -i '/scsi/d' include/Kbuild
   '';