diff --git a/lib/tools/ensure_dirs.py b/lib/tools/ensure_dirs.py
index 5fdb723651e6be6234e368c9403eacc396fe798b..868e36cd57fa64f5fd8b678a8220e81be0fdc7c8 100644
--- a/lib/tools/ensure_dirs.py
+++ b/lib/tools/ensure_dirs.py
@@ -170,7 +170,7 @@ def GetPaths():
      getent.daemons_gid),
     (constants.SOCKET_DIR, DIR, 0750, getent.masterd_uid,
      getent.daemons_gid),
-    (constants.MASTER_SOCKET, FILE, 0770, getent.masterd_uid,
+    (constants.MASTER_SOCKET, FILE, 0660, getent.masterd_uid,
      getent.daemons_gid, False),
     (constants.BDEV_CACHE_DIR, DIR, 0755, getent.noded_uid,
      getent.masterd_gid),