diff --git a/lib/types/host.nix b/lib/types/host.nix
index a7c4a93..cc3f0cf 100644
--- a/lib/types/host.nix
+++ b/lib/types/host.nix
@@ -199,7 +199,7 @@ rec {
               description = "IP to assign to the initrd image, allowing access to host during bootup.";
             };
             keypair = mkOption {
-              type = keypair-type;
+              type = (submodule keypair-type);
               description = "SSH host key pair to use for initrd.";
             };
           };