diff --git a/.hgignore b/.hgignore
index 54b54366df9..40ee75054db 100644
--- a/.hgignore
+++ b/.hgignore
@@ -14,6 +14,7 @@ syntax:glob
 core
 _obj
 _test
+_testmain.go
 y.tab.[ch]
 doc/htmlgen
 src/Make.inc