diff --git a/message/index.php b/message/index.php
index d4c6d4d0752..c04e6d51fad 100644
--- a/message/index.php
+++ b/message/index.php
@@ -114,10 +114,6 @@ $user2realuser = !empty($user2) && core_user::is_real_user($user2->id);
 $showactionlinks = $showactionlinks && $user2realuser;
 $systemcontext = context_system::instance();
 
-if (!empty($user2) && $user1->id == $user2->id) {
-    print_error('invaliduserid');
-}
-
 // Is the user involved in the conversation?
 // Do they have the ability to read other user's conversations?
 if (!message_current_user_is_involved($user1, $user2) && !has_capability('moodle/site:readallmessages', $systemcontext)) {