diff --git a/sjrpc/utils/datastructures.py b/sjrpc/utils/datastructures.py
index 2f62e34eee4eade95ea9afa8940c2339ed7a46de..d2fbcd2123a2225034fdeb63a88a4e06621f77a6 100644
--- a/sjrpc/utils/datastructures.py
+++ b/sjrpc/utils/datastructures.py
@@ -63,3 +63,9 @@ class BytesBuffer(object):
         '''
         
         return len(self._buf)
+
+    def __enter__(self):
+        return self._lock.__enter__()
+
+    def __exit__(self):
+        return self._lock.__exit__()