diff --git a/Marlin/src/lcd/extui/lib/anycubic/anycubic_serial.cpp b/Marlin/src/lcd/extui/lib/anycubic/anycubic_serial.cpp
index 3fad103bb..fd5f2691b 100644
--- a/Marlin/src/lcd/extui/lib/anycubic/anycubic_serial.cpp
+++ b/Marlin/src/lcd/extui/lib/anycubic/anycubic_serial.cpp
@@ -29,10 +29,10 @@
 
 #if ENABLED(ANYCUBIC_TFT_MODEL)
 
-#include "Arduino.h"
+#include <Arduino.h>
 
-// this next line disables the entire HardwareSerial.cpp,
-// so I can support AtTiny series and other chips without a UART
+// This next line disables the entire anycubic_serial.cpp,
+// to support AtTiny series and other chips without a UART
 #ifdef UBRR3H
 
 #include "anycubic_serial.h"
@@ -59,10 +59,8 @@ struct ring_buffer {
   volatile unsigned int tail;
 };
 
-#ifdef UBRR3H
-  ring_buffer rx_buffer_ajg  =  { { 0 }, 0, 0 };
-  ring_buffer tx_buffer_ajg  =  { { 0 }, 0, 0 };
-#endif
+ring_buffer rx_buffer_ajg  =  { { 0 }, 0, 0 };
+ring_buffer tx_buffer_ajg  =  { { 0 }, 0, 0 };
 
 inline void store_char(unsigned char c, ring_buffer *buffer) {
   int i = (unsigned int)(buffer->head + 1) % SERIAL_BUFFER_SIZE;
@@ -286,9 +284,7 @@ AnycubicSerialClass::operator bool() {
 
 // Preinstantiate Objects //////////////////////////////////////////////////////
 
-#ifdef UBRR3H
-  AnycubicSerialClass AnycubicSerial(&rx_buffer_ajg, &tx_buffer_ajg, &UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UCSR3C, &UDR3, RXEN3, TXEN3, RXCIE3, UDRIE3, U2X3);
-#endif
+AnycubicSerialClass AnycubicSerial(&rx_buffer_ajg, &tx_buffer_ajg, &UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UCSR3C, &UDR3, RXEN3, TXEN3, RXCIE3, UDRIE3, U2X3);
 
 #endif // UBRR3H
 #endif // ANYCUBIC_TFT_MODEL
diff --git a/Marlin/src/lcd/extui/lib/anycubic/anycubic_serial.h b/Marlin/src/lcd/extui/lib/anycubic/anycubic_serial.h
index a568a50c9..ed4c19b63 100644
--- a/Marlin/src/lcd/extui/lib/anycubic/anycubic_serial.h
+++ b/Marlin/src/lcd/extui/lib/anycubic/anycubic_serial.h
@@ -103,15 +103,15 @@ class AnycubicSerialClass : public Stream {
 extern void serialEventRun(void) __attribute__((weak));
 
 #define ANYCUBIC_SERIAL_PROTOCOL(x) (AnycubicSerial.print(x))
-#define ANYCUBIC_SERIAL_PROTOCOL_F(x,y) (AnycubicSerial.print(x,y))
+#define ANYCUBIC_SERIAL_PROTOCOL_F(x,y) (AnycubicSerial.print(x, y))
 #define ANYCUBIC_SERIAL_PROTOCOLPGM(x) (AnycubicSerialprintPGM(PSTR(x)))
-#define ANYCUBIC_SERIAL_(x) (AnycubicSerial.print(x),AnycubicSerial.write('\n'))
-#define ANYCUBIC_SERIAL_PROTOCOLLN(x) (AnycubicSerial.print(x),AnycubicSerial.write('\r'),AnycubicSerial.write('\n'))
-#define ANYCUBIC_SERIAL_PROTOCOLLNPGM(x) (AnycubicSerialprintPGM(PSTR(x)),AnycubicSerial.write('\r'),AnycubicSerial.write('\n'))
+#define ANYCUBIC_SERIAL_(x) (AnycubicSerial.print(x), AnycubicSerial.write('\n'))
+#define ANYCUBIC_SERIAL_PROTOCOLLN(x) (AnycubicSerial.print(x), AnycubicSerial.write('\r'), AnycubicSerial.write('\n'))
+#define ANYCUBIC_SERIAL_PROTOCOLLNPGM(x) (AnycubicSerialprintPGM(PSTR(x)), AnycubicSerial.write('\r'), AnycubicSerial.write('\n'))
 
-#define ANYCUBIC_SERIAL_START() (AnycubicSerial.write('\r'),AnycubicSerial.write('\n'))
-#define ANYCUBIC_SERIAL_CMD_SEND(x) (AnycubicSerialprintPGM(PSTR(x)),AnycubicSerial.write('\r'),AnycubicSerial.write('\n'))
-#define ANYCUBIC_SERIAL_ENTER() (AnycubicSerial.write('\r'),AnycubicSerial.write('\n'))
+#define ANYCUBIC_SERIAL_START() (AnycubicSerial.write('\r'), AnycubicSerial.write('\n'))
+#define ANYCUBIC_SERIAL_CMD_SEND(x) (AnycubicSerialprintPGM(PSTR(x)), AnycubicSerial.write('\r'), AnycubicSerial.write('\n'))
+#define ANYCUBIC_SERIAL_ENTER() (AnycubicSerial.write('\r'), AnycubicSerial.write('\n'))
 #define ANYCUBIC_SERIAL_SPACE() (AnycubicSerial.write(' '))
 
 const char newErr[] PROGMEM = "ERR ";
@@ -130,14 +130,16 @@ const char newSucc[] PROGMEM = "OK";
 #define ANYCUBIC_SERIAL_ECHOPGM(x) ANYCUBIC_SERIAL_PROTOCOLPGM(x)
 #define ANYCUBIC_SERIAL_ECHO(x) ANYCUBIC_SERIAL_PROTOCOL(x)
 
-FORCE_INLINE void AnycubicSerialprintPGM(const char *str) {
-  char ch = pgm_read_byte(str);
-  while (ch) {
-    AnycubicSerialClass::write(ch);
-    ch = pgm_read_byte(++str);
-  }
-}
-
 #ifdef UBRR3H
+
   extern AnycubicSerialClass AnycubicSerial;
+
+  FORCE_INLINE void AnycubicSerialprintPGM(const char *str) {
+    char ch = pgm_read_byte(str);
+    while (ch) {
+      AnycubicSerial.write(ch);
+      ch = pgm_read_byte(++str);
+    }
+  }
+
 #endif