diff --git a/nixos/modules/system/boot/systemd/initrd.nix b/nixos/modules/system/boot/systemd/initrd.nix
index 6c1b42da1c4..5e4a50aa404 100644
--- a/nixos/modules/system/boot/systemd/initrd.nix
+++ b/nixos/modules/system/boot/systemd/initrd.nix
@@ -193,7 +193,7 @@ in {
       description = ''
         Store paths to copy into the initrd as well.
       '';
-      type = types.listOf types.singleLineStr;
+      type = with types; listOf (oneOf [ singleLineStr package ]);
       default = [];
     };