diff --git a/apps/calendar/ajax/event/new.form.php b/apps/calendar/ajax/event/new.form.php
index f47cb6c3e2..91b85fff07 100755
--- a/apps/calendar/ajax/event/new.form.php
+++ b/apps/calendar/ajax/event/new.form.php
@@ -57,6 +57,7 @@ $tmpl->assign('repeat_byweekno_options', $repeat_byweekno_options);
 $tmpl->assign('repeat_bymonthday_options', $repeat_bymonthday_options);
 $tmpl->assign('repeat_weekofmonth_options', $repeat_weekofmonth_options);
 
+$tmpl->assign('eventid', 'new');
 $tmpl->assign('startdate', $start->format('d-m-Y'));
 $tmpl->assign('starttime', $start->format('H:i'));
 $tmpl->assign('enddate', $end->format('d-m-Y'));
diff --git a/apps/calendar/ajax/events.php b/apps/calendar/ajax/events.php
index f149e0d400..56fa51aaff 100755
--- a/apps/calendar/ajax/events.php
+++ b/apps/calendar/ajax/events.php
@@ -15,7 +15,7 @@ OCP\JSON::checkAppEnabled('calendar');
 // Look for the calendar id
 $calendar_id = OC_Calendar_App::getCalendar($_GET['calendar_id'], false, false);
 if($calendar_id !== false){
-	if(! is_numeric($calendar['userid']) && $calendar['userid'] != OCP\User::getUser()){
+	if(! is_numeric($calendar_id['userid']) && $calendar_id['userid'] != OCP\User::getUser()){
 		OCP\JSON::error();
 		exit;
 	}
diff --git a/apps/calendar/templates/part.eventform.php b/apps/calendar/templates/part.eventform.php
index b3bbf7a375..2d86ce4d31 100755
--- a/apps/calendar/templates/part.eventform.php
+++ b/apps/calendar/templates/part.eventform.php
@@ -9,7 +9,7 @@ echo 'Calendar.UI.Share.idtype = "event";' . "\n" . 'Calendar.UI.Share.currentid
 	<li><a href="#tabs-2"><?php echo $l->t('Repeating'); ?></a></li>
 	<!--<li><a href="#tabs-3"><?php echo $l->t('Alarm'); ?></a></li>
 	<li><a href="#tabs-4"><?php echo $l->t('Attendees'); ?></a></li>-->
-	<?php if($_['access'] == 'owner') { ?>
+	<?php if($_['access'] == 'owner' && $_['eventid'] != 'new') { ?>
 	<li><a href="#tabs-5"><?php echo $l->t('Share'); ?></a></li>
 	<?php } ?>
 </ul>
@@ -246,6 +246,6 @@ echo 'Calendar.UI.Share.idtype = "event";' . "\n" . 'Calendar.UI.Share.currentid
 <div id="tabs-4">//Attendees</div>-->
 <?php if($_['access'] == 'owner') { ?>
 <div id="tabs-5">
-	<?php echo $this->inc('share.dropdown'); ?>
+	<?php if($_['eventid'] != 'new'){ echo $this->inc('share.dropdown'); } ?>
 </div>
 <?php } ?>
diff --git a/apps/calendar/templates/share.dropdown.php b/apps/calendar/templates/share.dropdown.php
index 356a8d4fab..20d4c19bc1 100755
--- a/apps/calendar/templates/share.dropdown.php
+++ b/apps/calendar/templates/share.dropdown.php
@@ -72,6 +72,6 @@ echo OCP\html_select_options($allgroups, array());
 <?php endforeach; ?>
 </ul>
 <div id="public">
-	<input type="checkbox" id="publish" <?php echo ($public['share'])?'checked="checked"':'' ?>><label for="publish"><?php echo $l->t('make public'); ?></label><br>
-	<input type="text" id="public_token" value="<?php echo OCP\Util::linkToAbsolute('', 'public.php').'?service=calendar&t=' . $public['share'] ?>" onmouseover="$('#public_token').select();" style="<?php echo (!$public['share'])?'display:none':'' ?>">
-</div>
+	<input type="checkbox" id="publish" <?php echo (array_key_exists('share', $public))?'checked="checked"':'' ?>><label for="publish"><?php echo $l->t('make public'); ?></label><br>
+	<input type="text" id="public_token" value="<?php if(array_key_exists('share', $public)){echo OCP\Util::linkToAbsolute('', 'public.php').'?service=calendar&t=' . $public['share']; } ?>" onmouseover="$('#public_token').select();" style="<?php echo (!array_key_exists('share', $public))?'display:none':'' ?>">
+</div>
\ No newline at end of file