diff --git a/modules/installer/cd-dvd/installation-cd-base.nix b/modules/installer/cd-dvd/installation-cd-base.nix
index 3f6738859412..69089d600e4c 100644
--- a/modules/installer/cd-dvd/installation-cd-base.nix
+++ b/modules/installer/cd-dvd/installation-cd-base.nix
@@ -188,7 +188,7 @@ in
 
       # Add vfat to enable people to copy the contents of the CD to a
       # bootable USB stick.
-      "vfat"
+      "vfat" "nls_cp437" "nls_iso8859-1"
     ];
 
   boot.initrd.kernelModules =