diff --git a/deployment/data-model.nix b/deployment/data-model.nix
index d31c4efa..58aba169 100644
--- a/deployment/data-model.nix
+++ b/deployment/data-model.nix
@@ -55,6 +55,7 @@ in
                       {
                         options.apply = mkOption {
                           description = "Apply the policy to a request";
+                          type = optionType;
                         };
                       }
                     ];