diff --git a/trytond/ir/lang.xml b/trytond/ir/lang.xml
index 7f240f4114..e2b8daff27 100644
--- a/trytond/ir/lang.xml
+++ b/trytond/ir/lang.xml
@@ -9,6 +9,10 @@
             <field name="code">fr_FR</field>
             <field name="name">Français</field>
         </record>
+        <record model="ir.lang" id="lang_de">
+            <field name="code">de_DE</field>
+            <field name="name">Deutsch</field>
+        </record>
         <record model="ir.ui.view" id="lang_view_tree">
             <field name="model">ir.lang</field>
             <field name="type">tree</field>
diff --git a/trytond/web_service/db.py b/trytond/web_service/db.py
index c29c5106fe..3bf14151b2 100644
--- a/trytond/web_service/db.py
+++ b/trytond/web_service/db.py
@@ -243,4 +243,5 @@ class DB(Service):
         return [
             ('fr_FR', 'Français'),
             ('en_US', 'English'),
+            ('de_DE', 'Deutsch'),
         ]