diff --git a/.hgignore b/.hgignore
index 18ccfb5aab1..6128c2bbaef 100644
--- a/.hgignore
+++ b/.hgignore
@@ -87,6 +87,8 @@ PCbuild/Win32-temp-*
 PCbuild/x64-temp-*
 PCbuild/amd64
 PCbuild/ipch
+Tools/unicode/build/
+Tools/unicode/MAPPINGS/
 BuildLog.htm
 __pycache__
 Modules/_freeze_importlib