diff --git a/app/src/processing/app/EditorListener.java b/app/src/processing/app/EditorListener.java
index 12806b4ce78..3ed064c49cb 100644
--- a/app/src/processing/app/EditorListener.java
+++ b/app/src/processing/app/EditorListener.java
@@ -230,6 +230,10 @@ public boolean keyPressed(KeyEvent event) {
 event.consume();
 return true;
 
+ } else if (!tabsExpand) {
+ textarea.setSelectedText("\t");
+ event.consume();
+ return true;
 } else if (tabsIndent) {
 // this code is incomplete
 
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/arduino/Arduino/pull/2544.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/arduino/Arduino/pull/2544.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>