diff --git a/src/main/java/swiss/fihlon/apus/conference/Room.java b/src/main/java/swiss/fihlon/apus/conference/Room.java
index 998015b..03f1734 100644
--- a/src/main/java/swiss/fihlon/apus/conference/Room.java
+++ b/src/main/java/swiss/fihlon/apus/conference/Room.java
@@ -21,7 +21,7 @@
 
 public record Room(@NotNull String name) implements Comparable<Room> {
     @Override
-    public int compareTo(@NotNull Room other) {
+    public int compareTo(@NotNull final Room other) {
         return name.compareTo(other.name);
     }
 }