diff --git a/Spigot-Server-Patches/Fix-CraftServer.unloadWorld-Leak.patch b/Spigot-Server-Patches/Fix-CraftServer.unloadWorld-Leak.patch
index cb097bf3ee..4ef6e288ec 100644
--- a/Spigot-Server-Patches/Fix-CraftServer.unloadWorld-Leak.patch
+++ b/Spigot-Server-Patches/Fix-CraftServer.unloadWorld-Leak.patch
@@ -115,7 +115,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -        console.worldServer.remove(handle.getWorldProvider().getDimensionManager());
 +        // Paper start
 +        DimensionManager dimensionManager = handle.getWorldProvider().getDimensionManager();
-+        DimensionManager.unregister(world.getName(), dimensionManager);
++        DimensionManager.unregister(world.getName().toLowerCase(java.util.Locale.ENGLISH), dimensionManager);
 +        console.worldServer.remove(dimensionManager);
 +        // Paper end
          return true;