diff --git a/returns/contrib/mypy/returns_plugin.py b/returns/contrib/mypy/returns_plugin.py
index e50df9a3e..4831de529 100644
--- a/returns/contrib/mypy/returns_plugin.py
+++ b/returns/contrib/mypy/returns_plugin.py
@@ -12,9 +12,8 @@
 """
 
 from collections.abc import Callable, Mapping
-from typing import ClassVar, final
+from typing import ClassVar, TypeAlias, final
 
-from mypy.nodes import SymbolTableNode
 from mypy.plugin import (
     AttributeContext,
     FunctionContext,
@@ -39,22 +38,16 @@
 # ============
 
 #: Type for a function hook.
-_FunctionCallback = Callable[[FunctionContext], MypyType]
-
-#: Type for a function hook that need a definition node.
-_FunctionDefCallback = Callable[
-    [SymbolTableNode | None],
-    Callable[[FunctionContext], MypyType],
-]
+_FunctionCallback: TypeAlias = Callable[[FunctionContext], MypyType]
 
 #: Type for attribute hook.
-_AttributeCallback = Callable[[AttributeContext], MypyType]
+_AttributeCallback: TypeAlias = Callable[[AttributeContext], MypyType]
 
 #: Type for a method hook.
-_MethodCallback = Callable[[MethodContext], MypyType]
+_MethodCallback: TypeAlias = Callable[[MethodContext], MypyType]
 
 #: Type for a method signature hook.
-_MethodSigCallback = Callable[[MethodSigContext], CallableType]
+_MethodSigCallback: TypeAlias = Callable[[MethodSigContext], CallableType]
 
 
 # Interface