diff --git a/BREAKING_CHANGES.md b/BREAKING_CHANGES.md
index 7cd8ca61e7..db8293ac66 100644
--- a/BREAKING_CHANGES.md
+++ b/BREAKING_CHANGES.md
@@ -1,5 +1,16 @@
 # Breaking Changes
 
+## Upcoming
+
+### Files excluded by `.gitignore` are now ignored ([#1234](https://github.com/charliermarsh/ruff/pull/1234))
+
+Ruff will now avoid checking files that are excluded by a `.gitignore`. This behavior is powered by
+the [`ignore`](https://docs.rs/ignore/latest/ignore/struct.WalkBuilder.html#ignore-rules), and is
+applied in addition to Ruff's built-in `exclude` system.
+
+Note that hidden files (i.e., files and directories prefixed with a `.`) are _not_ ignored by
+default.
+
 ## 0.0.178
 
 ### Configuration files are now resolved hierarchically ([#1190](https://github.com/charliermarsh/ruff/pull/1190))