diff --git a/jedi/evaluate/base_context.py b/jedi/evaluate/base_context.py
index d809a2b4..48d97b02 100644
--- a/jedi/evaluate/base_context.py
+++ b/jedi/evaluate/base_context.py
@@ -35,7 +35,7 @@ class HelperContextMixin(object):
     def create_cached(cls, *args, **kwargs):
         return cls(*args, **kwargs)
 
-    def execute(self, arguments=None):
+    def execute(self, arguments):
         return self.evaluator.execute(self, arguments=arguments)
 
     def execute_evaluated(self, *value_list):
diff --git a/jedi/evaluate/compiled/__init__.py b/jedi/evaluate/compiled/__init__.py
index 6244f146..cb59f195 100644
--- a/jedi/evaluate/compiled/__init__.py
+++ b/jedi/evaluate/compiled/__init__.py
@@ -42,7 +42,7 @@ def create_simple_object(evaluator, obj):
         evaluator,
         evaluator.compiled_subprocess.create_simple_object(obj)
     )
-    instance, = builtin_from_name(evaluator, compiled_obj.name.string_name).execute()
+    instance, = builtin_from_name(evaluator, compiled_obj.name.string_name).execute_evaluated()
     return CompiledValue(instance, compiled_obj)