diff --git a/mastodon/src/main/res/values-es-rES/strings_sk.xml b/mastodon/src/main/res/values-es-rES/strings_sk.xml
index d383ad16c..c10917c15 100644
--- a/mastodon/src/main/res/values-es-rES/strings_sk.xml
+++ b/mastodon/src/main/res/values-es-rES/strings_sk.xml
@@ -60,4 +60,5 @@
     <string name="sk_example_domain">example.social</string>
     <string name="sk_welcome_title">¡Bienvenidos!</string>
     <string name="sk_color_theme_material3">Sistema</string>
+    <string name="sk_color_theme_red">Rojo</string>
 </resources>
\ No newline at end of file