diff --git a/nixos/modules/services/misc/rippled.nix b/nixos/modules/services/misc/rippled.nix
index 04df376dc51f..cdf61730de33 100644
--- a/nixos/modules/services/misc/rippled.nix
+++ b/nixos/modules/services/misc/rippled.nix
@@ -175,7 +175,7 @@ let
 
       onlineDelete = mkOption {
         description = "Enable automatic purging of older ledger information.";
-        type = types.addCheck (types.nullOr types.int) (v: v > 256);
+        type = types.nullOr (types.addCheck types.int (v: v > 256));
         default = cfg.ledgerHistory;
       };