diff --git a/src/main/java/org/asamk/SignalControl.java b/src/main/java/org/asamk/SignalControl.java
index 911ccb61..029b0455 100644
--- a/src/main/java/org/asamk/SignalControl.java
+++ b/src/main/java/org/asamk/SignalControl.java
@@ -28,6 +28,8 @@ public interface SignalControl extends DBusInterface {
 
     public String version();
 
+    public boolean isRegistered();
+
     List<DBusPath> listAccounts();
 
     interface Error {