diff --git a/actions/inbox.php b/actions/inbox.php
index 73155efd7a..6e38c80643 100644
--- a/actions/inbox.php
+++ b/actions/inbox.php
@@ -47,4 +47,8 @@ class InboxAction extends MailboxAction {
 	function get_message_profile($message) {
 		return $message->getFrom();
 	}
+	
+	function get_instructions() {
+		return _('This is your inbox, which lists your incoming private messages.');
+	}
 }
diff --git a/actions/outbox.php b/actions/outbox.php
index b09cd20327..5fdd43ddc0 100644
--- a/actions/outbox.php
+++ b/actions/outbox.php
@@ -47,4 +47,9 @@ class OutboxAction extends MailboxAction {
 	function get_message_profile($message) {
 		return $message->getTo();
 	}
+	
+	function get_instructions() {
+		return _('This is your outbox, which lists private messages you have sent.');
+	}
+	
 }