From d4fde9122288821d1c21f7e267aeb8eec7622e68 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Wed, 27 Jun 2018 22:39:59 -0500
Subject: [PATCH] Fix serial.h including itself

---
 Marlin/src/core/serial.cpp | 2 ++
 Marlin/src/core/serial.h   | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/core/serial.cpp b/Marlin/src/core/serial.cpp
index 2c0dabb52..d53d730c6 100644
--- a/Marlin/src/core/serial.cpp
+++ b/Marlin/src/core/serial.cpp
@@ -61,6 +61,8 @@ void serial_spaces(uint8_t count) { count *= (PROPORTIONAL_FONT_RATIO); while (c
 
 #if ENABLED(DEBUG_LEVELING_FEATURE)
 
+  #include "enum.h"
+
   void print_xyz(const char* prefix, const char* suffix, const float x, const float y, const float z) {
     serialprintPGM(prefix);
     SERIAL_CHAR('(');
diff --git a/Marlin/src/core/serial.h b/Marlin/src/core/serial.h
index 1b29cfc06..bbabdb70e 100644
--- a/Marlin/src/core/serial.h
+++ b/Marlin/src/core/serial.h
@@ -23,7 +23,8 @@
 #ifndef __SERIAL_H__
 #define __SERIAL_H__
 
-#include "../inc/MarlinConfig.h"
+#include "../inc/MarlinConfigPre.h"
+#include HAL_PATH(../HAL, HAL.h)
 
 /**
  * Define debug bit-masks