diff --git a/.gitignore b/.gitignore
index 3b7c613e65e..a7dd5a13b6f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,6 +38,7 @@ __pycache__/
 /src/libcore/unicode/UnicodeData.txt
 /src/libcore/unicode/downloaded
 /target/
+# Generated by compiletest for incremental:
 /tmp/
 tags
 tags.*