diff --git a/crates/hedz_reloaded/src/server.rs b/crates/hedz_reloaded/src/server.rs
index e91871d..068baf6 100644
--- a/crates/hedz_reloaded/src/server.rs
+++ b/crates/hedz_reloaded/src/server.rs
@@ -110,6 +110,8 @@ fn open_renet_server(
         commands.insert_resource(transport);
 
         info!("hosting server: netcode on port {port}");
+    } else {
+        return Err("Invalid configuration, choose either steam or netcode".into());
     }
 
     next.set(GameState::Playing);