diff --git a/part6-breakout/README.md b/part6-breakout/README.md
index 902ef01..39bd6d2 100644
--- a/part6-breakout/README.md
+++ b/part6-breakout/README.md
@@ -148,6 +148,8 @@ I hope writing your first game was easier than you thought it might be - and on
 
 _Well done, you've just written your first game!_
 
+PS: if you have issues using the Arm gcc compiler (namely an unexpected crash after painting the first brick), you might to try setting the compiler optimisation level to `-O1` instead of `-O2` in the _Makefile_. Some folks have [reported issues](https://github.com/isometimes/rpi4-osdev/issues/17), and I am able to reproduce these.
+
 ![The finished game](images/6-breakout-thefinishedgame.jpg)
 
 [Go to part7-bluetooth >](../part7-bluetooth)