diff --git a/langtools/.hgignore b/langtools/.hgignore
index 0092bd4ff5..83cef213d4 100644
--- a/langtools/.hgignore
+++ b/langtools/.hgignore
@@ -1,3 +1,4 @@
 ^build/
 ^dist/
 /nbproject/private/
+^.hgtip