diff --git a/TUTORIAL.md b/TUTORIAL.md
index 04d5fc2..823c525 100644
--- a/TUTORIAL.md
+++ b/TUTORIAL.md
@@ -351,9 +351,9 @@ Now save the file and hit _Reload_ in the build pane. Now try it out! The key bi
 
 Keep in mind that the `:on-show` function only runs when the screen first shows. Therefore, if you want to modify something there and see the result, after you hit _Reload_ you'll need to restart the screen.
 
-First, switch the REPL into the right namespace by typing `(in-ns 'hello-world.core)` and hitting enter. Then, type the following command, which runs the `set-screen!` function on the render thread in order to restart `main-screen`:
+First, switch the REPL into the right namespace by typing `(in-ns 'hello-world.core)` and hitting enter. Then, type the following command, which runs the `set-screen!` function on the GL thread in order to restart `main-screen`:
 
-`(app! :post-runnable #(set-screen! hello-world main-screen))`
+`(on-gl (set-screen! hello-world main-screen))`
 
 The next thing to try is reading and modifying state. Let's peek into the entities vector by typing the following into the REPL: