diff --git a/jedi/inference/names.py b/jedi/inference/names.py
index fd9fdb4b..5a106c46 100644
--- a/jedi/inference/names.py
+++ b/jedi/inference/names.py
@@ -314,8 +314,7 @@ class ParamName(BaseTreeParamName):
 
     def get_param(self):
         params_names, _ = self.parent_context.get_executed_param_names_and_issues()
-        param_node = search_ancestor(self.tree_name, 'param')
-        return params_names[param_node.position_index]
+        return params_names[self._get_param_node().position_index]
 
 
 class ParamNameWrapper(_ParamMixin):