diff --git a/libuavcan_drivers/linux/include/uavcan_linux/system_utils.hpp b/libuavcan_drivers/linux/include/uavcan_linux/system_utils.hpp
index b4d6ce0a5c..5aaa4d5eef 100644
--- a/libuavcan_drivers/linux/include/uavcan_linux/system_utils.hpp
+++ b/libuavcan_drivers/linux/include/uavcan_linux/system_utils.hpp
@@ -138,11 +138,11 @@ public:
  * It takes the following inputs:
  *  - Unique machine ID
  *  - Node name string (e.g. "org.uavcan.linux_app.dynamic_node_id_server")
- *  - Instance ID byte, e.g. node ID
+ *  - Instance ID byte, e.g. node ID (optional)
  */
 std::array<std::uint8_t, 16> makeApplicationID(const MachineIDReader::MachineID& machine_id,
                                                const std::string& node_name,
-                                               const std::uint8_t instance_id)
+                                               const std::uint8_t instance_id = 0)
 {
     union HalfID
     {