diff --git a/timers.h b/timers.h
index 9ceb8fb..41d0671 100644
--- a/timers.h
+++ b/timers.h
@@ -26,4 +26,4 @@ volatile unsigned long targetOverdwellTime;
 
 void initialiseTimers();
 
-#endif TIMERS_H
+#endif // TIMERS_H