diff --git a/README.md b/README.md
index 9e8fd60..648a5bd 100644
--- a/README.md
+++ b/README.md
@@ -409,6 +409,7 @@ With these definitions we can implement the statemachine example without the nee
 #include <tasks/ping_task.hpp>
 #include <tasks/pong_task.hpp>
 #include <path/to/states.hpp>
+#include <path/to/some.hpp>
 
 namespace tasks {
   PingTask::PingTask() :