diff --git a/src/main/java/org/asamk/SignalControl.java b/src/main/java/org/asamk/SignalControl.java
index 610ca103..4681e21b 100644
--- a/src/main/java/org/asamk/SignalControl.java
+++ b/src/main/java/org/asamk/SignalControl.java
@@ -16,6 +16,8 @@ public interface SignalControl extends DBusInterface {
             String number, boolean voiceVerification
     ) throws Error.Failure, Error.InvalidNumber, Error.RequiresCaptcha;
 
+    boolean isRegistered();
+
     void registerWithCaptcha(
             String number, boolean voiceVerification, String captcha
     ) throws Error.Failure, Error.InvalidNumber, Error.RequiresCaptcha;
diff --git a/src/main/java/org/asamk/signal/dbus/DbusSignalControlImpl.java b/src/main/java/org/asamk/signal/dbus/DbusSignalControlImpl.java
index cfd17610..39cd1a29 100644
--- a/src/main/java/org/asamk/signal/dbus/DbusSignalControlImpl.java
+++ b/src/main/java/org/asamk/signal/dbus/DbusSignalControlImpl.java
@@ -47,6 +47,11 @@ public class DbusSignalControlImpl implements org.asamk.SignalControl {
         registerWithCaptcha(number, voiceVerification, null);
     }
 
+    @Override
+    public boolean isRegistered() {
+        return false;
+    }
+
     @Override
     public void registerWithCaptcha(
             final String number, final boolean voiceVerification, final String captcha