diff --git a/libraries/AP_HAL/utility/Print.cpp b/libraries/AP_HAL/utility/Print.cpp
index db5dbfa28f..18a9310c2d 100644
--- a/libraries/AP_HAL/utility/Print.cpp
+++ b/libraries/AP_HAL/utility/Print.cpp
@@ -22,6 +22,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <stdint.h>
 #include <math.h>