diff --git a/VERSION b/VERSION
index 1648b8029..f97571ce5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.6.1e
+0.6.1f
diff --git a/synapse/__init__.py b/synapse/__init__.py
index d3f1c33d3..329138734 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -16,4 +16,4 @@
 """ This is a reference implementation of a synapse home server.
 """
 
-__version__ = "0.6.1e"
+__version__ = "0.6.1f"
diff --git a/synapse/events/utils.py b/synapse/events/utils.py
index 4ad37188b..5bfa820f9 100644
--- a/synapse/events/utils.py
+++ b/synapse/events/utils.py
@@ -45,12 +45,14 @@ def prune_event(event):
         "membership",
     ]
 
+    event_dict = event.get_dict()
+
     new_content = {}
 
     def add_fields(*fields):
         for field in fields:
             if field in event.content:
-                new_content[field] = event.content[field]
+                new_content[field] = event_dict["content"][field]
 
     if event_type == EventTypes.Member:
         add_fields("membership")
@@ -75,7 +77,7 @@ def prune_event(event):
 
     allowed_fields = {
         k: v
-        for k, v in event.get_dict().items()
+        for k, v in event_dict.items()
         if k in allowed_keys
     }