diff --git a/.gitignore b/.gitignore
index 8dd7e82960b..8bd9fea5987 100644
--- a/.gitignore
+++ b/.gitignore
@@ -85,6 +85,7 @@ fbcode/
 fbcode
 buckifier/*.pyc
 buckifier/__pycache__
+.arcconfig
 
 compile_commands.json
 clang-format-diff.py