diff --git a/actionmailbox/lib/rails/generators/mailbox/USAGE b/actionmailbox/lib/rails/generators/mailbox/USAGE
index d679dd63ae3..f6653b64127 100644
--- a/actionmailbox/lib/rails/generators/mailbox/USAGE
+++ b/actionmailbox/lib/rails/generators/mailbox/USAGE
@@ -7,6 +7,6 @@ Example:
 ========
     rails generate mailbox inbox
 
-    creates a InboxMailbox class and test:
+    creates an InboxMailbox class and test:
         Mailbox:  app/mailboxes/inbox_mailbox.rb
         Test:     test/mailboxes/inbox_mailbox_test.rb