diff --git a/hamilton/function_modifiers/adapters.py b/hamilton/function_modifiers/adapters.py
index 3b6a9ea5b..97a2c77e6 100644
--- a/hamilton/function_modifiers/adapters.py
+++ b/hamilton/function_modifiers/adapters.py
@@ -162,7 +162,7 @@ def get_loader_nodes(
         )
         if loader_cls is None:
             raise InvalidDecoratorException(
-                f"Could not resolve adapter for type: {load_type} given key"
+                f"Could not resolve loader for type: {load_type} given possibilities: {self.loader_classes} "
             )
         loader_factory = AdapterFactory(loader_cls, **self.kwargs)
         # dependencies is a map from param name -> source name