//Move this directory to ~/sketchbook/libraries
// and clone https://github.com/mavlink/c_library_v2.git inside
// git clone https://github.com/mavlink/c_library_V2.git ~/Arduino/libraries/MavlinkForArduino/c_library_v2

#include "c_library_v2/ardupilotmega/mavlink.h"

//Move this directory to ~/sketchbook/libraries
// and clone https://github.com/mavlink/c_library.git inside
// git clone https://github.com/mavlink/c_library.git ~/sketchbook/libraries/MavlinkForArduino

#include "c_library/ardupilotmega/mavlink.h"

--- 
+++ 
@@ -1,5 +1,5 @@
 //Move this directory to ~/sketchbook/libraries
-// and clone https://github.com/mavlink/c_library.git inside
-// git clone https://github.com/mavlink/c_library.git ~/sketchbook/libraries/MavlinkForArduino
+// and clone https://github.com/mavlink/c_library_v2.git inside
+// git clone https://github.com/mavlink/c_library_V2.git ~/Arduino/libraries/MavlinkForArduino/c_library_v2
 
-#include "c_library/ardupilotmega/mavlink.h"
+#include "c_library_v2/ardupilotmega/mavlink.h"
Use updated mavlink library v2
