From 88f30ccbbb3e484a73bc9b7a4737b6dc686b956a Mon Sep 17 00:00:00 2001
From: welaZat <werner.lamprecht@zuehlke.com>
Date: Tue, 16 Oct 2018 14:11:15 +0200
Subject: [PATCH] Added missing define in drivers/SerialWireOutput.h

---
 drivers/SerialWireOutput.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/SerialWireOutput.h b/drivers/SerialWireOutput.h
index ab3e38f3a1..1e90ebc17c 100644
--- a/drivers/SerialWireOutput.h
+++ b/drivers/SerialWireOutput.h
@@ -14,6 +14,9 @@
  * limitations under the License.
  */
 
+#ifndef MBED_SERIALWIREOUTPUT_H
+#define MBED_SERIALWIREOUTPUT_H
+
 #if defined(DEVICE_ITM)
 
 #include "hal/itm_api.h"
@@ -70,4 +73,6 @@ public:
 
 } // namespace mbed
 
-#endif
+#endif // DEVICE_ITM
+
+#endif // MBED_SERIALWIREOUTPUT_H