diff --git a/.gitignore b/.gitignore
index 64220a0df5..a66733d049 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 /.cipd
 /.gclient
 /.gclient_entries
+/.gclient_previous_sync_commits
 /build
 /buildtools
 /testing