diff --git a/pyconstants.py b/pyconstants.py
index f23f2d0..691e3f8 100644
--- a/pyconstants.py
+++ b/pyconstants.py
@@ -2,16 +2,15 @@ import sys
 from collections import defaultdict
 from typing import Dict, Callable, List, Final
 from dataclasses import dataclass
-
-FRAMETYPE = object
+from types import FrameType
 
 @dataclass
 class ConstantValue:
-    frame: FRAMETYPE # FIXME
+    frame: FrameType
     name: str
     value: object
 
-def _traceFun(frame: FRAMETYPE, event: str, arg: object) -> None: # FIXME
+def _traceFun(frame: FrameType, event: str, arg: object) -> None: # FIXME
     for constant in constMap[frame]:
         if constant.name in frame.f_locals and frame.f_locals[constant.name] != constant.value:
             frame.f_locals[constant.name] = constant.value 
@@ -28,6 +27,6 @@ class _ConstClass:
         constMap[targetFrame].append(ConstantValue(targetFrame, name, value))
 
 
-constMap: Dict[FRAMETYPE, List[ConstantValue]] = defaultdict(list) # FIXME
+constMap: Dict[FrameType, List[ConstantValue]] = defaultdict(list) # FIXME
 sys.settrace(lambda frame, event, arg: None)
 const = _ConstClass()