diff --git a/libuavcan/include/uavcan/time.hpp b/libuavcan/include/uavcan/time.hpp
index 3f25f3448e..a7958e5050 100644
--- a/libuavcan/include/uavcan/time.hpp
+++ b/libuavcan/include/uavcan/time.hpp
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <cstdio>
 #include <uavcan/stdint.hpp>
 #include <uavcan/impl_constants.hpp>
 #include <uavcan/util/templates.hpp>