diff --git a/module/task/control.php b/module/task/control.php
index f55ed55380..225a1bbf1f 100755
--- a/module/task/control.php
+++ b/module/task/control.php
@@ -831,6 +831,7 @@ class task extends control
             {
                 if(isset($muletipleTasks[$taskID]) and $task->assignedTo != $this->app->user->account and $task->mode == 'linear') continue;
                 if(isset($muletipleTasks[$taskID]) and !isset($muletipleTasks[$taskID][$this->post->assignedTo])) continue;
+                if($task->status == 'closed') continue;
 
                 $changes = $this->task->assign($taskID);
                 if(dao::isError()) return print(js::error(dao::getError()));
diff --git a/module/task/model.php b/module/task/model.php
index f60cd711f2..9f00f1450c 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -3582,7 +3582,7 @@ class taskModel extends model
 
         $btnClass     = $task->assignedTo == 'closed' ? ' disabled' : '';
         $btnClass     = "iframe btn btn-icon-left btn-sm {$btnClass}";
-        $assignToLink = helper::createLink('task', 'assignTo', "executionID=$task->execution&taskID=$task->id", '', true);
+        $assignToLink = $task->assignedTo == 'closed' ? '#' : helper::createLink('task', 'assignTo', "executionID=$task->execution&taskID=$task->id", '', true);
         $assignToHtml = html::a($assignToLink, "<i class='icon icon-hand-right'></i> <span title='" . zget($users, $task->assignedTo) . "' class='{$btnTextClass}'>{$assignedToText}</span>", '', "class='$btnClass'");
 
         echo !common::hasPriv('task', 'assignTo', $task) ? "<span style='padding-left: 21px' class='{$btnTextClass}'>{$assignedToText}</span>" : $assignToHtml;