diff --git a/rosidl_runtime_cpp/include/rosidl_runtime_cpp/traits.hpp b/rosidl_runtime_cpp/include/rosidl_runtime_cpp/traits.hpp
index bc9898165..713aa6686 100644
--- a/rosidl_runtime_cpp/include/rosidl_runtime_cpp/traits.hpp
+++ b/rosidl_runtime_cpp/include/rosidl_runtime_cpp/traits.hpp
@@ -16,6 +16,7 @@
 #define ROSIDL_RUNTIME_CPP__TRAITS_HPP_
 
 #include <codecvt>
+#include <iomanip>
 #include <string>
 #include <type_traits>