diff --git a/example/heartbeat.cpp b/example/heartbeat.cpp
index 4a1374a..b957339 100644
--- a/example/heartbeat.cpp
+++ b/example/heartbeat.cpp
@@ -1,10 +1,11 @@
-#include <chrono>
-#include <cstdio>
 #include <sdeventplus/clock.hpp>
 #include <sdeventplus/event.hpp>
 #include <sdeventplus/source/signal.hpp>
 #include <sdeventplus/source/time.hpp>
 #include <stdplus/signal.hpp>
+
+#include <chrono>
+#include <cstdio>
 #include <string>
 #include <utility>