diff --git a/pkgs/os-specific/linux/kernel/linux-3.9.nix b/pkgs/os-specific/linux/kernel/linux-3.9.nix
index 2f3c3a4365e6..7a1dfd110df9 100644
--- a/pkgs/os-specific/linux/kernel/linux-3.9.nix
+++ b/pkgs/os-specific/linux/kernel/linux-3.9.nix
@@ -252,6 +252,7 @@ import ./generic.nix (
 
   rec {
     version = "3.9-rc1";
+    modDirVersion = "3.9.0-rc1";
     testing = true;
 
     preConfigure = ''