diff --git a/src/android/org/linphone/LinphoneManager.java b/src/android/org/linphone/LinphoneManager.java
index 25154ac5c..e87d4642d 100644
--- a/src/android/org/linphone/LinphoneManager.java
+++ b/src/android/org/linphone/LinphoneManager.java
@@ -163,7 +163,7 @@ import static android.media.AudioManager.STREAM_VOICE_CALL;
  * Add Service Listener to react to Linphone state changes.
  *
  */
-public class LinphoneManager implements CoreListener, ChatMessageListener, SensorEventListener, AccountCreatorListener, ChatRoomListener {
+public class LinphoneManager implements CoreListener, ChatMessageListener, SensorEventListener, AccountCreatorListener {
 
 	private static LinphoneManager instance;
 	private Context mServiceContext;
@@ -618,26 +618,6 @@ public class LinphoneManager implements CoreListener, ChatMessageListener, Senso
 		LinphoneManager.getLc().setVideoDevice(newDevice);
 	}
 
-	@Override
-	public void onUndecryptableMessageReceived(ChatRoom cr, ChatMessage message) {
-
-	}
-
-	@Override
-	public void onStateChanged(ChatRoom cr, ChatRoom.State newState) {
-
-	}
-
-	@Override
-	public void onMessageReceived(ChatRoom cr, ChatMessage msg) {
-
-	}
-
-	@Override
-	public void onIsComposingReceived(ChatRoom cr, Address remoteAddr, boolean isComposing) {
-
-	}
-
 	public static interface AddressType {
 		void setText(CharSequence s);
 		CharSequence getText();
diff --git a/src/android/org/linphone/chat/GroupInfoFragment.java b/src/android/org/linphone/chat/GroupInfoFragment.java
index 784624d5f..70c35d2c0 100644
--- a/src/android/org/linphone/chat/GroupInfoFragment.java
+++ b/src/android/org/linphone/chat/GroupInfoFragment.java
@@ -36,9 +36,7 @@ import org.linphone.R;
 import org.linphone.activities.LinphoneActivity;
 import org.linphone.contacts.ContactAddress;
 import org.linphone.core.Address;
-import org.linphone.core.ChatMessage;
 import org.linphone.core.ChatRoom;
-import org.linphone.core.ChatRoomListener;
 import org.linphone.core.ChatRoomListenerStub;
 import org.linphone.mediastream.Log;