diff --git a/openbb_platform/core/openbb_core/app/router.py b/openbb_platform/core/openbb_core/app/router.py
index 50dac517686..7f3ab8f9870 100644
--- a/openbb_platform/core/openbb_core/app/router.py
+++ b/openbb_platform/core/openbb_core/app/router.py
@@ -437,7 +437,7 @@ class SignatureInspector:
         if not isinstance(results_type, type(None)):
             results_type = results_type_args[0]
 
-        is_list = get_origin(results_type) == list
+        is_list = isinstance(get_origin(results_type), list)
         inner_type = (
             results_type_args[0] if is_list and results_type_args else results_type
         )