diff --git a/README.md b/README.md
index b14b6b2..be14874 100644
--- a/README.md
+++ b/README.md
@@ -4,12 +4,18 @@ Godot 4.0's TileMap backported to 3.x as an engine module, with (eventually) a f
 
 The tilemap classes will be prefixed with R, so it compiles cleanly with the built in TileMap class.
 
+It needs https://github.com/godotengine/godot/pull/48395 to work. I expect it to be merged to upstream Godot in a few days, while that's underway my godot fork already has it (https://github.com/Relintai/godot).
+
 # Building
 
 1. Get the source code for the engine.
 
 ```git clone -b 3.x https://github.com/godotengine/godot.git godot```
 
+Or
+
+```git clone -b 3.x https://github.com/Relintai/godot.git godot```
+
 2. Go into Godot's modules directory.
 
 ```