diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index f59c1dc09..cfba2400e 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -538,4 +538,5 @@
     <string name="invalid_input">Entrada no válida</string>
     <string name="disable_sleep_timer">Desactivar el temporizador de apagado</string>
     <string name="start_sleep_timer">Iniciar temporizador de apagado automático</string>
-</resources>
+    <string name="add_to_group">Añadir al grupo</string>
+</resources>
\ No newline at end of file