diff --git a/machines/modules/malobeo/microvm_host.nix b/machines/modules/malobeo/microvm_host.nix
index cee56046..fc1c8162 100644
--- a/machines/modules/malobeo/microvm_host.nix
+++ b/machines/modules/malobeo/microvm_host.nix
@@ -16,7 +16,7 @@ in
 
       deployHosts = mkOption {
         default = [];
-        type = types.listOf string;
+        type = types.listOf types.str;
         description = ''
           List hostnames of MicroVMs that should be automatically initializes and autostart
         '';