diff --git a/django/core/mail.py b/django/core/mail.py
index 96a32ed62d..325812a5d2 100644
--- a/django/core/mail.py
+++ b/django/core/mail.py
@@ -265,7 +265,7 @@ class EmailMessage(object):
         """
         if isinstance(filename, MIMEBase):
             assert content == mimetype == None
-            self.attachements.append(filename)
+            self.attachments.append(filename)
         else:
             assert content is not None
             self.attachments.append((filename, content, mimetype))