diff --git a/modules/liquid.nix b/modules/liquid.nix
index 354e179..7158cf0 100644
--- a/modules/liquid.nix
+++ b/modules/liquid.nix
@@ -30,7 +30,7 @@ let
     rpcbind=${cfg.rpc.address}
     rpcconnect=${cfg.rpc.address}
     ${lib.concatMapStrings (rpcallowip: "rpcallowip=${rpcallowip}\n") cfg.rpcallowip}
-    ${optionalString (cfg.rpcuser != null) "rpcuser=${cfg.rpcuser}"}
+    rpcuser=${cfg.rpcuser}
     ${optionalString (cfg.rpcpassword != null) "rpcpassword=${cfg.rpcpassword}"}
     mainchainrpchost=${config.services.bitcoind.rpc.address}
     mainchainrpcport=${toString config.services.bitcoind.rpc.port}
@@ -138,8 +138,8 @@ in {
         '';
       };
       rpcuser = mkOption {
-          type = types.nullOr types.str;
-          default = null;
+          type = types.str;
+          default = "liquidrpc";
           description = "Username for JSON-RPC connections";
       };
       rpcpassword = mkOption {
diff --git a/modules/presets/secure-node.nix b/modules/presets/secure-node.nix
index 0b1e4b6..90a16ba 100644
--- a/modules/presets/secure-node.nix
+++ b/modules/presets/secure-node.nix
@@ -48,7 +48,6 @@ in {
     };
 
     services.liquidd = {
-      rpcuser = "liquidrpc";
       prune = 1000;
       validatepegin = true;
       listen = true;