diff --git a/VERSION b/VERSION
index 8b9dea59dc5796b06c058a67371c65d684c34d84..3b3e723172caef2ca393835c19c5d3ac796523b7 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.6.1a
+0.6.1b
diff --git a/synapse/__init__.py b/synapse/__init__.py
index 2195ad3177e4f04cfb96e4da480a8b4aca05472e..e7e27b06ec8a17754dca8578a80650cc2bc79cd9 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -16,4 +16,4 @@
 """ This is a reference implementation of a synapse home server.
 """
 
-__version__ = "0.6.1a"
+__version__ = "0.6.1b"
diff --git a/synapse/events/utils.py b/synapse/events/utils.py
index 4f4914467c039a62c6840ca93eb70ff638203c28..4ad37188bae98c59dc8b8baaa21a0084dd1ba1c7 100644
--- a/synapse/events/utils.py
+++ b/synapse/events/utils.py
@@ -98,7 +98,7 @@ def serialize_event(hs, e):
     d = {k: v for k, v in e.get_dict().items()}
     if "age_ts" in d["unsigned"]:
         now = int(hs.get_clock().time_msec())
-        d["unsigned"]["age"] = now - d["unsigned"]["age_ts"]
+        d["age"] = now - d["unsigned"]["age_ts"]
         del d["unsigned"]["age_ts"]
 
     d["user_id"] = d.pop("sender", None)