diff --git a/matrix/buffer.py b/matrix/buffer.py
index 87b76d1..70049a9 100644
--- a/matrix/buffer.py
+++ b/matrix/buffer.py
@@ -942,7 +942,7 @@ class RoomBuffer(object):
 
     @property
     def warning_prefix(self):
-        return G.CONFIG.encryption_warning_sign
+        return G.CONFIG.look.encryption_warning_sign
 
     @property
     def typing(self):