diff --git a/third_party/code.google.com/p/go.net/.hgignore b/third_party/code.google.com/p/go.net/.hgignore
index 571db5fda..c27ee1ef4 100644
--- a/third_party/code.google.com/p/go.net/.hgignore
+++ b/third_party/code.google.com/p/go.net/.hgignore
@@ -1,2 +1,3 @@
+# Add no patterns to .hgignore except for files generated by the build.
 syntax:glob
 last-change