diff --git a/construct-stubs/core.pyi b/construct-stubs/core.pyi
index 9cee278..1b5879b 100644
--- a/construct-stubs/core.pyi
+++ b/construct-stubs/core.pyi
@@ -80,6 +80,7 @@ def stream_seek(
 def stream_tell(stream: t.BinaryIO, path: t.Optional[PathType]) -> int: ...
 def stream_size(stream: t.BinaryIO) -> int: ...
 def stream_iseof(stream: t.BinaryIO) -> bool: ...
+def evaluate(param: ConstantOrContextLambda2[T], context: Context) -> T: ...
 
 # ===============================================================================
 # abstract constructs