X-Git-Url: https://vcs.fsf.org/?a=blobdiff_plain;f=CRM%2FCase%2FForm%2FActivityToCase.php;h=e591c8405afaa1643e9115c4d6e9120499013c79;hb=0f6021e9a5e880da0de6e9c5b3aae34f086508fa;hp=6611302e275b159cff745f995c7ef53077d551b7;hpb=8460eb815a69025401f719f41e02b606d3387010;p=civicrm-core.git

diff --git a/CRM/Case/Form/ActivityToCase.php b/CRM/Case/Form/ActivityToCase.php
index 6611302e27..e591c8405a 100644
--- a/CRM/Case/Form/ActivityToCase.php
+++ b/CRM/Case/Form/ActivityToCase.php
@@ -60,7 +60,7 @@ class CRM_Case_Form_ActivityToCase extends CRM_Core_Form {
     $params = ['id' => $this->_activityId];
 
     CRM_Activity_BAO_Activity::retrieve($params, $defaults);
-    $defaults['file_on_case_activity_subject'] = $defaults['subject'];
+    $defaults['file_on_case_activity_subject'] = $defaults['subject'] ?? '';
     $defaults['file_on_case_target_contact_id'] = $defaults['target_contact'];
 
     // If this contact has an open case, supply it as a default