diff --git a/qgroundcontrol.pro b/qgroundcontrol.pro
index 9d39bdfb413a9573bf6cf223b7d6d25aec146ab6..479767be0bd50176b8c8e30582bbaf011edadfa2 100644
--- a/qgroundcontrol.pro
+++ b/qgroundcontrol.pro
@@ -235,7 +235,6 @@ HEADERS += src/MG.h \
     src/comm/SerialSimulationLink.h \
     src/comm/ProtocolInterface.h \
     src/comm/MAVLinkProtocol.h \
-    src/comm/AS4Protocol.h \
     src/ui/CommConfigurationWindow.h \
     src/ui/SerialConfigurationWindow.h \
     src/ui/MainWindow.h \
@@ -362,7 +361,6 @@ SOURCES += src/main.cc \
     src/comm/SerialLink.cc \
     src/comm/SerialSimulationLink.cc \
     src/comm/MAVLinkProtocol.cc \
-    src/comm/AS4Protocol.cc \
     src/ui/CommConfigurationWindow.cc \
     src/ui/SerialConfigurationWindow.cc \
     src/ui/MainWindow.cc \
diff --git a/src/ui/MainWindow.h b/src/ui/MainWindow.h
index 6b21e2f43f479cf2c9a083edcb6f278ddb79d972..e0a0d65ad835ef938cd4cc6d8615ad8375b66270 100644
--- a/src/ui/MainWindow.h
+++ b/src/ui/MainWindow.h
@@ -49,7 +49,6 @@ This file is part of the QGROUNDCONTROL project
 #include "UASListWidget.h"
 #include "MAVLinkProtocol.h"
 #include "MAVLinkSimulationLink.h"
-#include "AS4Protocol.h"
 #include "ObjectDetectionView.h"
 #include "HUD.h"
 #include "JoystickWidget.h"
@@ -368,7 +367,6 @@ protected:
 
     // TODO Should be moved elsewhere, as the protocol does not belong to the UI
     MAVLinkProtocol* mavlink;
-    AS4Protocol* as4link;
 
     MAVLinkSimulationLink* simulationLink;
     LinkInterface* udpLink;