diff --git a/docs/full_guide.md b/docs/full_guide.md
index d0690706..b6995190 100644
--- a/docs/full_guide.md
+++ b/docs/full_guide.md
@@ -117,6 +117,8 @@ pre-commit:
       run: bundle exec rubocop {all_files} # {all_files} - list of files
 ```
 
+Note: If using `all_files` with RuboCop, it will ignore RuboCop's `Exclude` configuration setting. To avoid this, pass `--force-exclusion`.
+
 ## Custom file list
 
 Lefthook can be even more specific in selecting files.