diff --git a/src/dynapyt/runtime.py b/src/dynapyt/runtime.py
index 5b6b7e6..2fede47 100644
--- a/src/dynapyt/runtime.py
+++ b/src/dynapyt/runtime.py
@@ -97,7 +97,9 @@ def filtered(self, func, f, args):
             sub_args = args
         sub_arg_names = []
         for arg in sub_args:
-            if arg == () or arg == [] or arg == {}:
+            if (
+                isinstance(arg, tuple) or isinstance(arg, list) or isinstance(arg, dict)
+            ) and len(arg) == 0:
                 continue
             if type(arg) == tuple and len(arg) == 1:
                 arg = arg[0]