diff --git a/arch/x86/cpu/apollolake/itss.c b/arch/x86/cpu/apollolake/itss.c
index 8789f8e..95c9ebd 100644
--- a/arch/x86/cpu/apollolake/itss.c
+++ b/arch/x86/cpu/apollolake/itss.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Something to do with Interrupts, but I don't know what ITSS stands for
+ * Interrupt Timer Subsystem
  *
  * Copyright (C) 2017 Intel Corporation.
  * Copyright (C) 2017 Siemens AG
diff --git a/arch/x86/include/asm/arch-apollolake/itss.h b/arch/x86/include/asm/arch-apollolake/itss.h
index 1e29503..c75d8fe 100644
--- a/arch/x86/include/asm/arch-apollolake/itss.h
+++ b/arch/x86/include/asm/arch-apollolake/itss.h
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
+ * Interrupt Timer Subsystem
+ *
  * Copyright (C) 2017 Intel Corporation.
  * Copyright 2019 Google LLC
  *