diff --git a/palladium/config.py b/palladium/config.py
index 2829515..0790e56 100644
--- a/palladium/config.py
+++ b/palladium/config.py
@@ -52,7 +52,7 @@ def __call__(self, name, props):
         component = factory(**specification)
         try:
             component.__pld_config_key__ = name
-        except AttributeError:
+        except (AttributeError, ValueError):
             pass
         self.components.append(component)
         return component