diff --git a/TactilityKernel/Source/concurrent/thread.cpp b/TactilityKernel/Source/concurrent/thread.cpp
index 020632e7..c66fbbed 100644
--- a/TactilityKernel/Source/concurrent/thread.cpp
+++ b/TactilityKernel/Source/concurrent/thread.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: Apache-2.0
 #include <tactility/concurrent/thread.h>
 #include <tactility/concurrent/mutex.h>
 #include <tactility/check.h>
diff --git a/TactilityKernel/Source/concurrent/timer.c b/TactilityKernel/Source/concurrent/timer.c
index c0c8903a..f0badbb3 100644
--- a/TactilityKernel/Source/concurrent/timer.c
+++ b/TactilityKernel/Source/concurrent/timer.c
@@ -1,8 +1,8 @@
 // SPDX-License-Identifier: Apache-2.0
 
-#include "tactility/timer.h"
-#include "tactility/check.h"
-#include "tactility/freertos/timers.h"
+#include <tactility/concurrent/timer.h>
+#include <tactility/check.h>
+#include <tactility/freertos/timers.h>
 #include <stdlib.h>
 
 struct Timer {