diff --git a/src/Imap.php b/src/Imap.php
index 2449bb2..fdfa43a 100644
--- a/src/Imap.php
+++ b/src/Imap.php
@@ -1093,7 +1093,7 @@ private function getEmailResponse($command, $parameters = array(), $first = fals
                 //if there is email data
                 if (!empty($email)) {
                     //create the email format and add it to emails
-                    $emails[$uniqueId] = $this->getEmailFormat($email, $uniqueId, $flags);
+                    $emails[$uniqueId] = $this->getEmailFormat($email, $uniqueId, isset($flags) && is_array($flags) ? $flags : []);
 
                     //if all we want is the first one
                     if ($first) {
@@ -1160,7 +1160,7 @@ private function getEmailResponse($command, $parameters = array(), $first = fals
                 //if there is email data
                 if (!empty($email)) {
                     //create the email format and add it to emails
-                    $emails[$uniqueId] = $this->getEmailFormat($email, $uniqueId, $flags);
+                    $emails[$uniqueId] = $this->getEmailFormat($email, $uniqueId, isset($flags) && is_array($flags) ? $flags : []);
 
                     //if all we want is the first one
                     if ($first) {