diff --git a/.hgignore b/.hgignore
index 07ab288..2eec40a 100644
--- a/.hgignore
+++ b/.hgignore
@@ -33,6 +33,8 @@ syntax: glob
 
 tramp
 
+ProtBuf.el
+
 org-mode/doc/org
 
 gnus/