diff --git a/bijoe/engine.py b/bijoe/engine.py
index 8838f59..b44bd8c 100644
--- a/bijoe/engine.py
+++ b/bijoe/engine.py
@@ -232,7 +232,10 @@ class ProxyListDescriptor(object):
         self.chain = chain
 
     def __get__(self, obj, t=None):
-        return ProxyList(obj.engine, obj, self.attribute, self.cls, chain=self.chain)
+        key = '_proxy_list_cache_%s' % id(self)
+        if key not in obj.__dict__:
+            obj.__dict__[key] = ProxyList(obj.engine, obj, self.attribute, self.cls, chain=self.chain)
+        return obj.__dict__[key]
 
 
 class EngineCube(object):