diff --git a/jedi/_compatibility.py b/jedi/_compatibility.py
index d9df3b22..6bccd3a1 100644
--- a/jedi/_compatibility.py
+++ b/jedi/_compatibility.py
@@ -426,17 +426,6 @@ def highest_pickle_protocol(python_versions):
     return protocol
 
 
-try:
-    from inspect import Parameter
-except ImportError:
-    class Parameter(object):
-        POSITIONAL_ONLY = object()
-        POSITIONAL_OR_KEYWORD = object()
-        VAR_POSITIONAL = object()
-        KEYWORD_ONLY = object()
-        VAR_KEYWORD = object()
-
-
 class GeneralizedPopen(subprocess.Popen):
     def __init__(self, *args, **kwargs):
         if os.name == 'nt':
diff --git a/jedi/api/completion.py b/jedi/api/completion.py
index 90b03541..0e9d140c 100644
--- a/jedi/api/completion.py
+++ b/jedi/api/completion.py
@@ -1,12 +1,12 @@
 import re
 from textwrap import dedent
+from inspect import Parameter
 
 from parso.python.token import PythonTokenTypes
 from parso.python import tree
 from parso.tree import search_ancestor, Leaf
 from parso import split_lines
 
-from jedi._compatibility import Parameter
 from jedi import debug
 from jedi import settings
 from jedi.api import classes
diff --git a/jedi/api/helpers.py b/jedi/api/helpers.py
index 0463b893..f9e7d8b6 100644
--- a/jedi/api/helpers.py
+++ b/jedi/api/helpers.py
@@ -6,11 +6,12 @@ from collections import namedtuple
 from textwrap import dedent
 from itertools import chain
 from functools import wraps
+from inspect import Parameter
 
 from parso.python.parser import Parser
 from parso.python import tree
 
-from jedi._compatibility import u, Parameter
+from jedi._compatibility import u
 from jedi.inference.base_value import NO_VALUES
 from jedi.inference.syntax_tree import infer_atom
 from jedi.inference.helpers import infer_call_of_leaf
diff --git a/jedi/inference/compiled/value.py b/jedi/inference/compiled/value.py
index 61b134ad..6cf08bc5 100644
--- a/jedi/inference/compiled/value.py
+++ b/jedi/inference/compiled/value.py
@@ -3,10 +3,11 @@ Imitate the parser representation.
 """
 import re
 from functools import partial
+from inspect import Parameter
 
 from jedi import debug
 from jedi.inference.utils import to_list
-from jedi._compatibility import force_unicode, Parameter, cast_path
+from jedi._compatibility import force_unicode, cast_path
 from jedi.cache import memoize_method
 from jedi.inference.filters import AbstractFilter
 from jedi.inference.names import AbstractNameDefinition, ValueNameMixin, \
diff --git a/jedi/inference/gradual/annotation.py b/jedi/inference/gradual/annotation.py
index 05416111..77a8abc5 100644
--- a/jedi/inference/gradual/annotation.py
+++ b/jedi/inference/gradual/annotation.py
@@ -6,10 +6,10 @@ as annotations in future python versions.
 """
 
 import re
+from inspect import Parameter
 
 from parso import ParserSyntaxError, parse
 
-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.base import DefineGenericBaseClass, GenericClass
diff --git a/jedi/inference/names.py b/jedi/inference/names.py
index ccf42d4c..73c0a1d9 100644
--- a/jedi/inference/names.py
+++ b/jedi/inference/names.py
@@ -1,8 +1,8 @@
 from abc import abstractmethod
+from inspect import Parameter
 
 from parso.tree import search_ancestor
 
-from jedi._compatibility import Parameter
 from jedi.parser_utils import find_statement_documentation, clean_scope_docstring
 from jedi.inference.utils import unite
 from jedi.inference.base_value import ValueSet, NO_VALUES
diff --git a/jedi/inference/param.py b/jedi/inference/param.py
index c1ce541a..a4bee9a2 100644
--- a/jedi/inference/param.py
+++ b/jedi/inference/param.py
@@ -1,4 +1,5 @@
 from collections import defaultdict
+from inspect import Parameter
 
 from jedi import debug
 from jedi.inference.utils import PushBackIterator
@@ -6,7 +7,6 @@ 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
 from jedi.inference.names import ParamName
 
 
diff --git a/jedi/inference/signature.py b/jedi/inference/signature.py
index 77d3960d..b0a98eb0 100644
--- a/jedi/inference/signature.py
+++ b/jedi/inference/signature.py
@@ -1,4 +1,5 @@
-from jedi._compatibility import Parameter
+from inspect import Parameter
+
 from jedi.cache import memoize_method
 from jedi import debug
 from jedi import parser_utils
diff --git a/jedi/inference/star_args.py b/jedi/inference/star_args.py
index 0cda3839..78ec8a0b 100644
--- a/jedi/inference/star_args.py
+++ b/jedi/inference/star_args.py
@@ -10,8 +10,8 @@ This means for example in this case::
 
 The signature here for bar should be `bar(b, c)` instead of bar(*args).
 """
+from inspect import Parameter
 
-from jedi._compatibility import Parameter
 from jedi.inference.utils import to_list
 from jedi.inference.names import ParamNameWrapper
 from jedi.inference.helpers import is_big_annoying_library
diff --git a/jedi/plugins/django.py b/jedi/plugins/django.py
index 88a3bfae..33e2faf3 100644
--- a/jedi/plugins/django.py
+++ b/jedi/plugins/django.py
@@ -1,7 +1,8 @@
 """
 Module is used to infer Django model fields.
 """
-from jedi._compatibility import Parameter
+from inspect import Parameter
+
 from jedi import debug
 from jedi.inference.cache import inference_state_function_cache
 from jedi.inference.base_value import ValueSet, iterator_to_value_set, ValueWrapper
diff --git a/jedi/plugins/stdlib.py b/jedi/plugins/stdlib.py
index 5e093e72..dc097ac3 100644
--- a/jedi/plugins/stdlib.py
+++ b/jedi/plugins/stdlib.py
@@ -11,8 +11,9 @@ compiled module that returns the types for C-builtins.
 """
 import parso
 import os
+from inspect import Parameter
 
-from jedi._compatibility import force_unicode, Parameter
+from jedi._compatibility import force_unicode
 from jedi import debug
 from jedi.inference.utils import safe_property
 from jedi.inference.helpers import get_str_or_none