diff --git a/src/drivers/kinetis/tone_alarm/tone_alarm.cpp b/src/drivers/kinetis/tone_alarm/tone_alarm.cpp
index 533ad7db3e..d01b77fe75 100644
--- a/src/drivers/kinetis/tone_alarm/tone_alarm.cpp
+++ b/src/drivers/kinetis/tone_alarm/tone_alarm.cpp
@@ -206,7 +206,7 @@ class ToneAlarm : public device::CDev
 {
 public:
 	ToneAlarm();
-	~ToneAlarm() = default;
+	~ToneAlarm();
 
 	virtual int init();
 	void status();
@@ -287,6 +287,7 @@ ToneAlarm::~ToneAlarm()
 		usleep(100000);
 	}
 }
+
 int
 ToneAlarm::init()
 {