diff --git a/install.rdf b/install.rdf
index c315daca..215832c5 100644
--- a/install.rdf
+++ b/install.rdf
@@ -103,7 +103,7 @@
       </RDF:Description>
     </em:localized>
     <em:localized>
-      <RDF:Description em:locale="ru-RU"
+      <RDF:Description em:locale="ru"
                        em:name="Tree Style Tab (Древовидный стиль вкладок)"
                        em:description="Отображение вкладок в виде дерева"
                        em:homepageURL="http://piro.sakura.ne.jp/xul/_treestyletab.html.en"
@@ -111,7 +111,7 @@
           <em:contributor>Zusukar (auto-shrink mode)</em:contributor>
           <em:contributor>Alice0775 (compatibility problem)</em:contributor>
           <em:contributor>Philipp von Weitershausen (Sidebar style)</em:contributor>
-          <em:translator>L'Autour (ru-RU locale)</em:translator>
+          <em:translator>L'Autour (ru locale)</em:translator>
       </RDF:Description>
     </em:localized>
     <em:localized>
diff --git a/jar-chrome.manifest b/jar-chrome.manifest
index 9bd1e1ba..f5bf3439 100644
--- a/jar-chrome.manifest
+++ b/jar-chrome.manifest
@@ -22,7 +22,7 @@ locale	treestyletab	zh-CN	jar:chrome/treestyletab.jar!/locale/zh-CN/treestyletab
 locale	treestyletab	es-ES	jar:chrome/treestyletab.jar!/locale/es-ES/treestyletab/
 locale	treestyletab	de-DE	jar:chrome/treestyletab.jar!/locale/de-DE/treestyletab/
 locale	treestyletab	zh-TW	jar:chrome/treestyletab.jar!/locale/zh-TW/treestyletab/
-locale	treestyletab	ru-RU	jar:chrome/treestyletab.jar!/locale/ru-RU/treestyletab/
+locale	treestyletab	ru	jar:chrome/treestyletab.jar!/locale/ru/treestyletab/
 locale	treestyletab	pl	jar:chrome/treestyletab.jar!/locale/pl/treestyletab/
 locale	treestyletab	fr-FR	jar:chrome/treestyletab.jar!/locale/fr-FR/treestyletab/
 locale	treestyletab	sv-SE	jar:chrome/treestyletab.jar!/locale/sv-SE/treestyletab/
diff --git a/locale/ru-RU/treestyletab/license.txt b/locale/ru/treestyletab/license.txt
similarity index 100%
rename from locale/ru-RU/treestyletab/license.txt
rename to locale/ru/treestyletab/license.txt
diff --git a/locale/ru-RU/treestyletab/treestyletab.dtd b/locale/ru/treestyletab/treestyletab.dtd
similarity index 100%
rename from locale/ru-RU/treestyletab/treestyletab.dtd
rename to locale/ru/treestyletab/treestyletab.dtd
diff --git a/locale/ru-RU/treestyletab/treestyletab.properties b/locale/ru/treestyletab/treestyletab.properties
similarity index 100%
rename from locale/ru-RU/treestyletab/treestyletab.properties
rename to locale/ru/treestyletab/treestyletab.properties
diff --git a/omnixpi-chrome.manifest b/omnixpi-chrome.manifest
index 93124a3c..1671323b 100644
--- a/omnixpi-chrome.manifest
+++ b/omnixpi-chrome.manifest
@@ -22,7 +22,7 @@ locale	treestyletab	zh-CN	locale/zh-CN/treestyletab/
 locale	treestyletab	es-ES	locale/es-ES/treestyletab/
 locale	treestyletab	de-DE	locale/de-DE/treestyletab/
 locale	treestyletab	zh-TW	locale/zh-TW/treestyletab/
-locale	treestyletab	ru-RU	locale/ru-RU/treestyletab/
+locale	treestyletab	ru	locale/ru/treestyletab/
 locale	treestyletab	pl	locale/pl/treestyletab/
 locale	treestyletab	fr-FR	locale/fr-FR/treestyletab/
 locale	treestyletab	sv-SE	locale/sv-SE/treestyletab/