diff --git a/app/Helper/SubtaskHelper.php b/app/Helper/SubtaskHelper.php
index 19ffa86dc..8ff4bc48d 100644
--- a/app/Helper/SubtaskHelper.php
+++ b/app/Helper/SubtaskHelper.php
@@ -32,7 +32,7 @@ class SubtaskHelper extends Base
     public function renderTitle(array $subtask)
     {
         if ($subtask['status'] == 0) {
-            $html = '<i class="fa fa-square-o fa-fw"></i>';
+            $html = '<i class="fa fa-square-o fa-fw ' . ($this->hasSubtaskInProgress() ? 'js-modal-confirm' : '') . '"></i>';
         } elseif ($subtask['status'] == 1) {
             $html = '<i class="fa fa-gears fa-fw"></i>';
         } else {