diff --git a/.bzrignore b/.bzrignore
index f5f678ca360..a17b1dec6cb 100644
--- a/.bzrignore
+++ b/.bzrignore
@@ -3101,3 +3101,4 @@ libmysqld/merge_archives_mysqlserver.cmake
 libmysqld/mysqlserver_depends.c
 libmysqld/examples/mysql_embedded
 sql/.empty
+mysys/thr_lock