diff --git a/application/Espo/Services/Note.php b/application/Espo/Services/Note.php
index 0d904bc1e4..35b0e06d32 100644
--- a/application/Espo/Services/Note.php
+++ b/application/Espo/Services/Note.php
@@ -119,6 +119,10 @@ class Note extends Record
             throw new ForbiddenSilent("Only 'Post' type allowed.");
         }
 
+        if ($this->user->isPortal()) {
+            $entity->set('isInternal', false);
+        }
+
         if ($entity->isPost()) {
             $this->handlePostText($entity);
         }