diff --git a/Firmware/MarlinSerial.cpp b/Firmware/MarlinSerial.cpp
index 76101e7a7..7eccd8487 100644
--- a/Firmware/MarlinSerial.cpp
+++ b/Firmware/MarlinSerial.cpp
@@ -312,7 +312,7 @@ void MarlinSerial::println(double n, int digits)
 void MarlinSerial::printNumber(unsigned long n, uint8_t base)
 {
   unsigned char buf[8 * sizeof(long)]; // Assumes 8-bit chars. 
-  unsigned long i = 0;
+  uint8_t i = 0;
 
   if (n == 0) {
     print('0');
diff --git a/Firmware/lcd.cpp b/Firmware/lcd.cpp
index 98f967d48..cbad5d81a 100644
--- a/Firmware/lcd.cpp
+++ b/Firmware/lcd.cpp
@@ -621,7 +621,7 @@ void lcd_print(double n, int digits)
 void lcd_printNumber(unsigned long n, uint8_t base)
 {
 	unsigned char buf[8 * sizeof(long)]; // Assumes 8-bit chars. 
-	unsigned long i = 0;
+	uint8_t i = 0;
 	if (n == 0)
 	{
 		lcd_print('0');