diff --git a/app/src/main/java/com/nutomic/syncthingandroid/model/Gui.java b/app/src/main/java/com/nutomic/syncthingandroid/model/Gui.java
index c1fe08d8..608cc4e8 100644
--- a/app/src/main/java/com/nutomic/syncthingandroid/model/Gui.java
+++ b/app/src/main/java/com/nutomic/syncthingandroid/model/Gui.java
@@ -19,6 +19,10 @@ public class Gui {
     public String user = "syncthing";               // Default in this app
     public String password;                         // This will be set to the "apiKey" in {@link ConfigXml#}
     public String apiKey;                           // Automatically generated by SyncthingNative
+
+    /**
+     * Available: default, dark, black
+     */
     public String theme = "default";
 
     // omitEmpty