2 files changed, 7 insertions, 2 deletions
diff --git a/app/Filter/BaseFilter.php b/app/Filter/BaseFilter.php
index e029f4e1..2687d903 100644
--- a/app/Filter/BaseFilter.php
+++ b/app/Filter/BaseFilter.php
@@ -51,7 +51,7 @@ abstract class BaseFilter
      *
      * @access public
      * @param  Table $query
-     * @return \Kanboard\Core\Filter\FilterInterface
+     * @return $this
      */
     public function withQuery(Table $query)
     {
@@ -64,7 +64,7 @@ abstract class BaseFilter
      *
      * @access public
      * @param  string $value
-     * @return \Kanboard\Core\Filter\FilterInterface
+     * @return $this
      */
     public function withValue($value)
     {
diff --git a/app/Filter/TaskDueDateRangeFilter.php b/app/Filter/TaskDueDateRangeFilter.php
index a6aefbe2..a4250f80 100644
--- a/app/Filter/TaskDueDateRangeFilter.php
+++ b/app/Filter/TaskDueDateRangeFilter.php
@@ -32,6 +32,11 @@ class TaskDueDateRangeFilter extends BaseFilter implements FilterInterface
      */
     public function apply()
     {
+        $this->query->beginOr();
+        $this->query->isNull(TaskModel::TABLE.'.date_started');
+        $this->query->eq(TaskModel::TABLE.'.date_started', 0);
+        $this->query->closeOr();
+
         $this->query->gte(TaskModel::TABLE.'.date_due', is_numeric($this->value[0]) ? $this->value[0] : strtotime($this->value[0]));
         $this->query->lte(TaskModel::TABLE.'.date_due', is_numeric($this->value[1]) ? $this->value[1] : strtotime($this->value[1]));
         return $this;