diff --git a/application/Espo/Core/Mail/Importer.php b/application/Espo/Core/Mail/Importer.php
index ecccfe5fea..16c5a169f6 100644
--- a/application/Espo/Core/Mail/Importer.php
+++ b/application/Espo/Core/Mail/Importer.php
@@ -416,7 +416,7 @@ class Importer
         $parentType = $email->get('parentType');
         $parentId = $email->get('parentId');
 
-        if (!$parentId || ~$parentType) {
+        if (!$parentId || !$parentType) {
             return;
         }