diff --git a/.hgignore b/.hgignore
index 9803f656dbdc..a566cc73796c 100644
--- a/.hgignore
+++ b/.hgignore
@@ -13,6 +13,10 @@
 \.gcov
 compile_commands\.json
 
+# Generated by hg (e.g. revert, failed patch, ...)
+\.orig$
+\.rej$
+
 # Ignore Python .egg-info directories for first-party modules (but,
 # still add vendored packages' .egg-info directories)
 ^(?=.*\.egg-info/)(?!^third_party/python/)(?!^testing/web-platform/tests/tools/third_party/)