diff --git a/src/gen/proxy/proxybase.py b/src/gen/proxy/proxybase.py
index c1f19775c..0a7e188d0 100644
--- a/src/gen/proxy/proxybase.py
+++ b/src/gen/proxy/proxybase.py
@@ -306,7 +306,7 @@ class ProxyDbBase(DbReadBase):
         """
         Returns obj if predicate is True or not callable, else returns None
         """
-        if predicate is not None:
+        if predicate is not None and obj is not None:
             return obj if predicate(obj.handle) else None
         return obj