diff --git a/patches/015-email-mail-template.patch b/patches/015-email-mail-template.patch
index 71c708d8fc2a3bf5fe24c3a31fe72291b810cfeb..d6281ed1a5f09b4b9c3b9e0fcde2cbe4f37a8c19 100644
--- a/patches/015-email-mail-template.patch
+++ b/patches/015-email-mail-template.patch
@@ -67,8 +67,8 @@
 +		if ($method !== self::METHOD_CANCEL && $method !== self::METHOD_REPLY && count($vevent)>1) {
 +			$template->addHeadingBanner('#EFFFDB','#293618',$l10n->t('This recurring event has been updated, please review the information below:'));
 +		}
-+		$sequence = $vevent->SEQUENCE->getValue();
-+		if ($method !== self::METHOD_CANCEL && $method !== self::METHOD_REPLY && count($vevent)==1 && ($sequence > 2)) {
++		$sequence = $vevent->SEQUENCE ? $vevent->SEQUENCE->getValue() : NULL;
++		if ($sequence && $method !== self::METHOD_CANCEL && $method !== self::METHOD_REPLY && count($vevent)==1 && ($sequence > 2)) {
 +			$template->addHeadingBanner('#EFFFDB','#293618',$l10n->t('This event has been updated, please review the information below:'));
 +		}
  		$this->addBulletList($template, $l10n, $vevent);