diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index 0ee3938..64f5d8b 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -110,4 +110,6 @@
     <string name="sources_import_opml">Importar feeds desde OPML</string>
     <string name="bookmark_remove">Eliminar marcador</string>
     <string name="title_service">Servicio</string>
+    <string name="theme_auto_system_black">Automáticamente (del sistema; negro)</string>
+    <string name="theme_black">Negro</string>
 </resources>
\ No newline at end of file