diff --git a/libraries/GCS_MAVLink/GCS_Dummy.h b/libraries/GCS_MAVLink/GCS_Dummy.h
index 3af250b056..bf8333c6b1 100644
--- a/libraries/GCS_MAVLink/GCS_Dummy.h
+++ b/libraries/GCS_MAVLink/GCS_Dummy.h
@@ -11,6 +11,11 @@ class GCS_MAVLINK_Dummy : public GCS_MAVLINK
     bool try_send_message(enum ap_message id) { return true; }
     bool handle_guided_request(AP_Mission::Mission_Command &cmd) override { return true; }
     void handle_change_alt_request(AP_Mission::Mission_Command &cmd) override {}
+
+protected:
+
+    AP_Mission *get_mission() override { return nullptr; }
+
 };
 
 /*
diff --git a/libraries/GCS_MAVLink/examples/routing/routing.cpp b/libraries/GCS_MAVLink/examples/routing/routing.cpp
index 60b98fa1d9..7260039d96 100644
--- a/libraries/GCS_MAVLink/examples/routing/routing.cpp
+++ b/libraries/GCS_MAVLink/examples/routing/routing.cpp
@@ -21,6 +21,7 @@ public:
 protected:
 
     uint32_t telem_delay() const override { return 0; }
+    AP_Mission *get_mission() override { return nullptr; }
 
 private: