diff --git a/stdlib/3/email/message.pyi b/stdlib/3/email/message.pyi
index 06ae1b591d02..552ffcb40bd1 100644
--- a/stdlib/3/email/message.pyi
+++ b/stdlib/3/email/message.pyi
@@ -16,7 +16,7 @@ _PayloadType = Union[List[Message], str, bytes]
 _CharsetType = Union[Charset, str, None]
 _ParamsType = Union[str, None, Tuple[str, Optional[str], str]]
 _ParamType = Union[str, Tuple[Optional[str], Optional[str], str]]
-_HeaderType = Any
+_HeaderType = Union[str, Header[ContentTransferEncodingHeader, ContentTypeHeader, UniqueDateHeader, SingleAddressHeader, AddressHeader, UniqueAddressHeader, UniqueSingleAddressHeader, MIMEVersionHeader, UniqueUnstructuredHeader, DateHeader, ContentDispositionHeader]]
 
 class Message:
     preamble: Optional[str]