diff --git a/construct_typed/tunion.py b/construct_typed/tunion.py
index b575943..4651563 100644
--- a/construct_typed/tunion.py
+++ b/construct_typed/tunion.py
@@ -11,7 +11,7 @@ DataclassType = t.TypeVar("DataclassType")
 
 
 def TUnionField(
-    subcon: Construct[ParsedType, BuildTypes],
+    subcon: Construct[ParsedType, t.Any],
     doc: t.Optional[str] = None,
     parsed: t.Optional[t.Callable[[t.Any, "cs.Context"], None]] = None,
 ) -> ParsedType:
@@ -28,9 +28,9 @@ def TUnionField(
         # some subcons have a predefined default value. all other have "None"
         default: t.Any = None
         if isinstance(subcon, (cs.Const, cs.Default)):
-            if callable(subcon.value):  # type: ignore
+            if callable(subcon.value):
                 raise ValueError("lamda as default is not supported")
-            default = subcon.value  # type: ignore
+            default = subcon.value
 
         # if subcon builds from "None", set default to "None"
         field = dataclasses.field(