diff --git a/stdlib/2/email/charset.pyi b/stdlib/2/email/charset.pyi
index 82ba6c0bbbc5..53c9166fba53 100644
--- a/stdlib/2/email/charset.pyi
+++ b/stdlib/2/email/charset.pyi
@@ -2,6 +2,10 @@ def add_charset(charset, header_enc=..., body_enc=..., output_charset=...) -> No
 def add_alias(alias, canonical) -> None: ...
 def add_codec(charset, codecname) -> None: ...
 
+QP: int       # undocumented
+BASE64: int   # undocumented
+SHORTEST: int # undocumented
+
 class Charset:
     input_charset = ...
     header_encoding = ...
diff --git a/stdlib/3/email/mime/application.pyi b/stdlib/3/email/mime/application.pyi
index 1aa0580ec891..1a40e281f447 100644
--- a/stdlib/3/email/mime/application.pyi
+++ b/stdlib/3/email/mime/application.pyi
@@ -6,6 +6,6 @@ from email.mime.nonmultipart import MIMENonMultipart
 _ParamsType = Union[str, None, Tuple[str, Optional[str], str]]
 
 class MIMEApplication(MIMENonMultipart):
-    def __init__(self, _data: bytes, _subtype: str = ...,
+    def __init__(self, _data: Union[str, bytes], _subtype: str = ...,
                  _encoder: Callable[[MIMEApplication], None] = ...,
                  **_params: _ParamsType) -> None: ...
diff --git a/stdlib/3/email/mime/audio.pyi b/stdlib/3/email/mime/audio.pyi
index 2d2c90c2af50..5bb57d3a5d7a 100644
--- a/stdlib/3/email/mime/audio.pyi
+++ b/stdlib/3/email/mime/audio.pyi
@@ -6,6 +6,6 @@ from email.mime.nonmultipart import MIMENonMultipart
 _ParamsType = Union[str, None, Tuple[str, Optional[str], str]]
 
 class MIMEAudio(MIMENonMultipart):
-    def __init__(self, _audiodata: bytes, _subtype: Optional[str] = ...,
+    def __init__(self, _audiodata: Union[str, bytes], _subtype: Optional[str] = ...,
                  _encoder: Callable[[MIMEAudio], None] = ...,
                  **_params: _ParamsType) -> None: ...
diff --git a/stdlib/3/email/mime/image.pyi b/stdlib/3/email/mime/image.pyi
index 9ec5deba0916..d32d9ee650fc 100644
--- a/stdlib/3/email/mime/image.pyi
+++ b/stdlib/3/email/mime/image.pyi
@@ -6,6 +6,6 @@ from email.mime.nonmultipart import MIMENonMultipart
 _ParamsType = Union[str, None, Tuple[str, Optional[str], str]]
 
 class MIMEImage(MIMENonMultipart):
-    def __init__(self, _imagedata: bytes, _subtype: Optional[str] = ...,
+    def __init__(self, _imagedata: Union[str, bytes], _subtype: Optional[str] = ...,
                  _encoder: Callable[[MIMEImage], None] = ...,
                  **_params: _ParamsType) -> None: ...