diff --git a/jedi/inference/gradual/annotation.py b/jedi/inference/gradual/annotation.py
index 76d76078..7a85e6d7 100644
--- a/jedi/inference/gradual/annotation.py
+++ b/jedi/inference/gradual/annotation.py
@@ -9,7 +9,7 @@ import re
 
 from parso import ParserSyntaxError, parse
 
-from jedi._compatibility import force_unicode
+from jedi._compatibility import force_unicode, Parameter
 from jedi.inference.cache import inference_state_method_cache
 from jedi.inference.base_value import ValueSet, NO_VALUES
 from jedi.inference.gradual.typing import TypeVar, LazyGenericClass, \
@@ -257,11 +257,11 @@ def infer_type_vars_for_execution(execution_context, annotation_dict):
         if annotation_variables:
             # Infer unknown type var
             annotation_value_set = context.infer_node(annotation_node)
-            star_count = executed_param._param_node.star_count
+            kind = executed_param.get_kind()
             actual_value_set = executed_param.infer(use_hints=False)
-            if star_count == 1:
+            if kind is Parameter.VAR_POSITIONAL:
                 actual_value_set = actual_value_set.merge_types_of_iterate()
-            elif star_count == 2:
+            elif kind is Parameter.VAR_KEYWORD:
                 # TODO _dict_values is not public.
                 actual_value_set = actual_value_set.try_merge('_dict_values')
             for ann in annotation_value_set:
diff --git a/jedi/inference/param.py b/jedi/inference/param.py
index f123fc0e..22d170a8 100644
--- a/jedi/inference/param.py
+++ b/jedi/inference/param.py
@@ -6,6 +6,7 @@ from jedi.inference import analysis
 from jedi.inference.lazy_value import LazyKnownValue, \
     LazyTreeValue, LazyUnknownValue
 from jedi.inference.value import iterable
+from jedi._compatibility import Parameter
 
 
 def _add_argument_issue(error_name, lazy_value, message):
@@ -20,7 +21,6 @@ class ExecutedParam(object):
     """Fake a param and give it values."""
     def __init__(self, execution_context, param_node, lazy_value, is_default=False):
         self._execution_context = execution_context
-        self._param_node = param_node
         from jedi.inference.names import ParamName
         self._name = ParamName(execution_context, param_node.name)
         self._lazy_value = lazy_value
@@ -30,11 +30,14 @@ class ExecutedParam(object):
     def infer(self, use_hints=True):
         return self._lazy_value.infer()
 
+    def get_kind(self):
+        return self._name.get_kind()
+
     def matches_signature(self):
         if self._is_default:
             return True
         argument_values = self.infer(use_hints=False).py__class__()
-        if self._param_node.star_count:
+        if self._name.get_kind() in (Parameter.VAR_POSITIONAL, Parameter.VAR_KEYWORD):
             return True
         annotations = self._name.infer_annotation(execute_annotation=False)
         if not annotations: