diff --git a/module/project/control.php b/module/project/control.php
index db36a93b18..15eb50346d 100644
--- a/module/project/control.php
+++ b/module/project/control.php
@@ -1859,11 +1859,22 @@ class project extends control
     {
         if($confirm == 'no')
         {
-            echo js::confirm(sprintf($this->lang->project->confirmDelete, $this->projects[$projectID]), $this->createLink('project', 'delete', "projectID=$projectID&confirm=yes"));
+            /* Get the number of unfinished tasks and unresolved bugs. */
+            $unfinishedTasks = $this->dao->select('COUNT(id) AS count')->from(TABLE_TASK)->where('project')->eq($projectID)->andWhere('deleted')->eq(0)->andWhere('status')->in('wait,doing')->fetch();
+            $unresolvedBugs  = $this->dao->select('COUNT(id) AS count')->from(TABLE_BUG)->where('project')->eq($projectID)->andWhere('deleted')->eq(0)->andWhere('status')->eq('active')->fetch();
+
+            /* Set prompt information. */
+            $tips = '';
+            if($unfinishedTasks->count) $tips  = sprintf($this->lang->project->unfinishedTask, $unfinishedTasks->count);
+            if($unresolvedBugs->count)  $tips .= sprintf($this->lang->project->unresolvedBug,  $unresolvedBugs->count);
+            if($tips)                   $tips  = $this->lang->project->unfinishedProject . $tips;
+
+            echo js::confirm($tips . sprintf($this->lang->project->confirmDelete, $this->projects[$projectID]), $this->createLink('project', 'delete', "projectID=$projectID&confirm=yes"));
             exit;
         }
         else
         {
+            /* Delete project. */
             $this->project->delete(TABLE_PROJECT, $projectID);
             $this->dao->update(TABLE_DOCLIB)->set('deleted')->eq(1)->where('project')->eq($projectID)->exec();
             $this->project->updateUserView($projectID);
diff --git a/module/project/lang/de.php b/module/project/lang/de.php
index 130636b365..1e9155c6a1 100644
--- a/module/project/lang/de.php
+++ b/module/project/lang/de.php
@@ -275,6 +275,9 @@ $lang->project->noweekend             = 'Ohne Wochenende';
 $lang->project->withweekend           = 'Mit Wochenende';
 $lang->project->interval              = 'Intervale ';
 $lang->project->fixFirstWithLeft      = 'Modify the left';
+$lang->project->unfinishedProject     = "This {$lang->projectCommon} has ";
+$lang->project->unfinishedTask        = "[%s] unfinished tasks. ";
+$lang->project->unresolvedBug         = "[%s] unresolved bugs. ";
 
 $lang->project->action = new stdclass();
 $lang->project->action->opened  = '$date, created by <strong>$actor</strong> . $extra' . "\n";
diff --git a/module/project/lang/en.php b/module/project/lang/en.php
index 24aa8f3ba5..0275dca4f6 100644
--- a/module/project/lang/en.php
+++ b/module/project/lang/en.php
@@ -275,6 +275,9 @@ $lang->project->noweekend             = 'Exclude Weekend';
 $lang->project->withweekend           = 'Include Weekend';
 $lang->project->interval              = 'Intervals ';
 $lang->project->fixFirstWithLeft      = 'Update hours left too';
+$lang->project->unfinishedProject     = "This {$lang->projectCommon} has ";
+$lang->project->unfinishedTask        = "[%s] unfinished tasks. ";
+$lang->project->unresolvedBug         = "[%s] unresolved bugs. ";
 
 $lang->project->action = new stdclass();
 $lang->project->action->opened  = '$date, created by <strong>$actor</strong> . $extra' . "\n";
diff --git a/module/project/lang/fr.php b/module/project/lang/fr.php
index dab155609c..8d012b2cb1 100644
--- a/module/project/lang/fr.php
+++ b/module/project/lang/fr.php
@@ -275,6 +275,9 @@ $lang->project->noweekend             = 'Exclure les Weekends';
 $lang->project->withweekend           = 'Inclure les Weekends';
 $lang->project->interval              = 'Intervalles';
 $lang->project->fixFirstWithLeft      = 'Mettre à jour les heures également';
+$lang->project->unfinishedProject     = "This {$lang->projectCommon} has ";
+$lang->project->unfinishedTask        = "[%s] unfinished tasks. ";
+$lang->project->unresolvedBug         = "[%s] unresolved bugs. ";
 
 $lang->project->action = new stdclass();
 $lang->project->action->opened  = '$date, créée par <strong>$actor</strong> .' . "\n";
diff --git a/module/project/lang/vi.php b/module/project/lang/vi.php
index 6b97ffd0ad..bd74e38c55 100644
--- a/module/project/lang/vi.php
+++ b/module/project/lang/vi.php
@@ -275,6 +275,9 @@ $lang->project->noweekend             = 'Không gồm cuối tuần';
 $lang->project->withweekend           = 'Bao gồm cuối tuần';
 $lang->project->interval              = 'Intervals ';
 $lang->project->fixFirstWithLeft      = 'Cập nhật cả giờ còn lại';
+$lang->project->unfinishedProject     = "This {$lang->projectCommon} has ";
+$lang->project->unfinishedTask        = "[%s] unfinished tasks. ";
+$lang->project->unresolvedBug         = "[%s] unresolved bugs. ";
 
 $lang->project->action = new stdclass();
 $lang->project->action->opened  = '$date, được tạo bởi <strong>$actor</strong>  $extra.' . "\n";
diff --git a/module/project/lang/zh-cn.php b/module/project/lang/zh-cn.php
index 3af509476f..989413475a 100644
--- a/module/project/lang/zh-cn.php
+++ b/module/project/lang/zh-cn.php
@@ -275,6 +275,9 @@ $lang->project->noweekend             = '去除周末';
 $lang->project->withweekend           = '显示周末';
 $lang->project->interval              = '间隔';
 $lang->project->fixFirstWithLeft      = '修改剩余工时';
+$lang->project->unfinishedProject     = "该{$lang->projectCommon}下还有";
+$lang->project->unfinishedTask        = "[%s]个未完成的任务，";
+$lang->project->unresolvedBug         = "[%s]个未解决的bug，";
 
 $lang->project->action = new stdclass();
 $lang->project->action->opened  = '$date, 由 <strong>$actor</strong> 创建。$extra' . "\n";