diff --git a/Marlin/src/HAL/HAL_LPC1768/HardwareSerial.cpp b/Marlin/src/HAL/HAL_LPC1768/include/HardwareSerial.cpp
similarity index 100%
rename from Marlin/src/HAL/HAL_LPC1768/HardwareSerial.cpp
rename to Marlin/src/HAL/HAL_LPC1768/include/HardwareSerial.cpp
diff --git a/Marlin/src/HAL/HAL_LPC1768/HardwareSerial.h b/Marlin/src/HAL/HAL_LPC1768/include/HardwareSerial.h
similarity index 100%
rename from Marlin/src/HAL/HAL_LPC1768/HardwareSerial.h
rename to Marlin/src/HAL/HAL_LPC1768/include/HardwareSerial.h
diff --git a/Marlin/src/HAL/HAL_LPC1768/SoftwareSerial.cpp b/Marlin/src/HAL/HAL_LPC1768/include/SoftwareSerial.cpp
similarity index 99%
rename from Marlin/src/HAL/HAL_LPC1768/SoftwareSerial.cpp
rename to Marlin/src/HAL/HAL_LPC1768/include/SoftwareSerial.cpp
index 6051026163..0baba4b2b3 100644
--- a/Marlin/src/HAL/HAL_LPC1768/SoftwareSerial.cpp
+++ b/Marlin/src/HAL/HAL_LPC1768/include/SoftwareSerial.cpp
@@ -42,7 +42,7 @@
 #include <stdarg.h>
 #include <Arduino.h>
 #include <pinmapping.h>
-#include "fastio.h"
+#include "../fastio.h"
 #include "SoftwareSerial.h"
 
 void GpioEnableInt(uint32_t port, uint32_t pin, uint32_t mode);
diff --git a/Marlin/src/HAL/HAL_LPC1768/SoftwareSerial.h b/Marlin/src/HAL/HAL_LPC1768/include/SoftwareSerial.h
similarity index 100%
rename from Marlin/src/HAL/HAL_LPC1768/SoftwareSerial.h
rename to Marlin/src/HAL/HAL_LPC1768/include/SoftwareSerial.h