diff --git a/sw/airborne/modules/datalink/mavlink.c b/sw/airborne/modules/datalink/mavlink.c
index 7531f91c07..1072479ae0 100644
--- a/sw/airborne/modules/datalink/mavlink.c
+++ b/sw/airborne/modules/datalink/mavlink.c
@@ -49,6 +49,8 @@
 #endif
 #include "generated/flight_plan.h"
 
+// for UINT16_MAX
+#include <stdint.h>
 
 mavlink_system_t mavlink_system;