diff --git a/post.php b/post.php
index 997201b0..daaffcf6 100644
--- a/post.php
+++ b/post.php
@@ -932,6 +932,13 @@ function handle_post()
         // Check if banned
         checkBan($board['uri']);
 
+        if ($config['op_require_history'] && $post['op']) {
+            $has_any = has_any_history($_SERVER['REMOTE_ADDR']);
+            if (!$has_any) {
+                error($config['error']['opnohistory']);
+            }
+        }
+
         if ($post['mod'] = isset($_POST['mod']) && $_POST['mod']) {
             check_login(false);
             if (!$mod) {