diff --git a/Marlin/MarlinSerial.cpp b/Marlin/MarlinSerial.cpp
index 9ef900265..c1aa790da 100644
--- a/Marlin/MarlinSerial.cpp
+++ b/Marlin/MarlinSerial.cpp
@@ -21,18 +21,16 @@
  */
 
 /**
-  MarlinSerial.cpp - Hardware serial library for Wiring
-  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
-
-  Modified 23 November 2006 by David A. Mellis
-  Modified 28 September 2010 by Mark Sproul
-  Modified 14 February 2016 by Andreas Hardtung (added tx buffer)
-*/
-
+ * MarlinSerial.cpp - Hardware serial library for Wiring
+ * Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+ *
+ * Modified 23 November 2006 by David A. Mellis
+ * Modified 28 September 2010 by Mark Sproul
+ * Modified 14 February 2016 by Andreas Hardtung (added tx buffer)
+ */
 #include "MarlinSerial.h"
 
 #include "stepper.h"
-
 #include "Marlin.h"
 
 #ifndef USBCON
diff --git a/Marlin/SdFatUtil.h b/Marlin/SdFatUtil.h
index 9db81ac57..2e6435bbd 100644
--- a/Marlin/SdFatUtil.h
+++ b/Marlin/SdFatUtil.h
@@ -26,17 +26,16 @@
  *
  * This file is part of the Arduino Sd2Card Library
  */
+#ifndef SdFatUtil_h
+#define SdFatUtil_h
+
 #include "Marlin.h"
 #if ENABLED(SDSUPPORT)
 
-#ifndef SdFatUtil_h
-#define SdFatUtil_h
 /**
  * \file
  * \brief Useful utility functions.
  */
-#include "Marlin.h"
-#include "MarlinSerial.h"
 /** Store and print a string in flash memory.*/
 #define PgmPrint(x) SerialPrint_P(PSTR(x))
 /** Store and print a string in flash memory followed by a CR/LF.*/
@@ -51,7 +50,7 @@ namespace SdFatUtil {
 }
 
 using namespace SdFatUtil;  // NOLINT
-#endif  //#define SdFatUtil_h
 
+#endif // SDSUPPORT
 
-#endif
+#endif // SdFatUtil_h