diff --git a/chalice/config.py b/chalice/config.py
index 75d800a61..6714dab2d 100644
--- a/chalice/config.py
+++ b/chalice/config.py
@@ -206,6 +206,9 @@ def _chain_lookup(self, name, varies_per_chalice_stage=False,
             search_dicts.append(
                 self._config_from_disk.get('lambda_functions', {}).get(
                     self.function_name, {}))
+            search_dicts.append(
+                self._user_provided_params.get('lambda_functions', {}).get(
+                    self.function_name, {}))
         search_dicts.extend([self._config_from_disk, self._default_params])
         for cfg_dict in search_dicts:
             if isinstance(cfg_dict, dict) and cfg_dict.get(name) is not None: