diff --git a/src/documents/mail.py b/src/documents/mail.py
index f1a84d8e0..1be62527d 100644
--- a/src/documents/mail.py
+++ b/src/documents/mail.py
@@ -75,8 +75,9 @@ class Message(Loggable):
                 continue
 
             dispositions = content_disposition.strip().split(";")
-            if not dispositions[0].lower() == "attachment" and \
-               "filename" not in dispositions[1].lower():
+            if len(dispositions) < 2 or \
+               (not dispositions[0].lower() == "attachment" and
+               "filename" not in dispositions[1].lower()):
                 continue
 
             file_data = part.get_payload()