diff --git a/stdlib/3/email/message.pyi b/stdlib/3/email/message.pyi
index c4c4f30cb..946dca242 100644
--- a/stdlib/3/email/message.pyi
+++ b/stdlib/3/email/message.pyi
@@ -95,9 +95,9 @@ class MIMEPart(Message):
     def add_alternative(self, *args: Any,
                         content_manager: Optional[ContentManager] = ...,
                         **kw: Any) -> None: ...
-    def add_attachement(self, *args: Any,
-                        content_manager: Optional[ContentManager] = ...,
-                        **kw: Any) -> None: ...
+    def add_attachment(self, *args: Any,
+                       content_manager: Optional[ContentManager] = ...,
+                       **kw: Any) -> None: ...
     def clear(self) -> None: ...
     def clear_content(self) -> None: ...
     def is_attachment(self) -> bool: ...