diff --git a/share/doc/homebrew/Troubleshooting.md b/share/doc/homebrew/Troubleshooting.md
index 8a409617e6..268aa8ed84 100644
--- a/share/doc/homebrew/Troubleshooting.md
+++ b/share/doc/homebrew/Troubleshooting.md
@@ -1,4 +1,6 @@
 # Troubleshooting
+**If you saw `Error: uninitialized constant Formulary::HOMEBREW_CORE_FORMULA_REGEX. Please report this bug: ...` don't worry: it's [already been fixed](https://github.com/Homebrew/homebrew/commit/ac5707c37470c25583d8fb712bf5dc04ab91db4b). Please only create an issue (or comment on [the existing one](https://github.com/Homebrew/homebrew/issues/42553) if running `brew update` again doesn't fix it. Thanks!**
+
 ## Read this first!
 
 Please run `brew update` and `brew doctor` *before* creating an issue!