diff --git a/conf/airframes/examples/ardrone2_gazebo.xml b/conf/airframes/examples/ardrone2_gazebo.xml
index 2603eaa853..3f17fa6942 100644
--- a/conf/airframes/examples/ardrone2_gazebo.xml
+++ b/conf/airframes/examples/ardrone2_gazebo.xml
@@ -34,7 +34,10 @@
-
+
+
+
+
diff --git a/conf/airframes/examples/ardrone2_opticflow_hover.xml b/conf/airframes/examples/ardrone2_opticflow_hover.xml
index 5e07eb836d..8bb8e8d30d 100644
--- a/conf/airframes/examples/ardrone2_opticflow_hover.xml
+++ b/conf/airframes/examples/ardrone2_opticflow_hover.xml
@@ -34,6 +34,9 @@
+
+
+
diff --git a/conf/airframes/tudelft/ardrone2_opticflow.xml b/conf/airframes/tudelft/ardrone2_opticflow.xml
index c391238284..fcbdc75210 100644
--- a/conf/airframes/tudelft/ardrone2_opticflow.xml
+++ b/conf/airframes/tudelft/ardrone2_opticflow.xml
@@ -38,6 +38,9 @@
+
+
+
diff --git a/conf/airframes/tudelft/ardrone2_opticflow_indi.xml b/conf/airframes/tudelft/ardrone2_opticflow_indi.xml
index a351e614d6..798cfe551d 100644
--- a/conf/airframes/tudelft/ardrone2_opticflow_indi.xml
+++ b/conf/airframes/tudelft/ardrone2_opticflow_indi.xml
@@ -37,6 +37,9 @@
+
+
+