diff --git a/boards/arm/lpc54xx/lpcxpresso-lpc54628/README.txt b/boards/arm/lpc54xx/lpcxpresso-lpc54628/README.txt
index 1f0eb5fec7d..4726bcb0ef7 100644
--- a/boards/arm/lpc54xx/lpcxpresso-lpc54628/README.txt
+++ b/boards/arm/lpc54xx/lpcxpresso-lpc54628/README.txt
@@ -567,3 +567,8 @@ Configurations
        borderless.  There is however, a fine border around each toolbar
        widget with ruins the feel that the theme was trying for.
 
+    4. Revisiting this configuration after a few months, I found that the
+       configuration generated a hardfault.  This turned out to be an issue
+       with the toolchain and dropping the optimization level eliminated the
+       problem; -O2 was sufficient for me.  If you see odd behavior like
+       this, you might want to do the same.