diff --git a/MessagingApp.markdown b/MessagingApp.markdown
index 95af9d1..dd26a51 100644
--- a/MessagingApp.markdown
+++ b/MessagingApp.markdown
@@ -7,7 +7,7 @@ MessagingApp uses a single channel with a random identifier:
 
 ### Message types
 
-**0: PRIVATE_MESSAGE** - The content is a [BDF](BDF) list with two elements: `message_body` (string) and `attachments` (dictionary, may be null). The key for each attachment is its name, and the value is a list with two elements: `mime_type` (string), and `message_id` (raw, exactly HASH_LEN bytes).
+**0: PRIVATE_MESSAGE** - The content is a [BDF](BDF) list with two elements: `body` (string) and `attachments` (dictionary, may be null). The key for each attachment is its name, and the value is a list with two elements: `mime_type` (string), and `message_id` (raw, exactly HASH_LEN bytes).
 
 **1: ATTACHMENT** - The content is raw data.