diff --git a/fantemp/terminal.hpp b/fantemp/terminal.hpp
index 4cf5c03..a6a20f0 100644
--- a/fantemp/terminal.hpp
+++ b/fantemp/terminal.hpp
@@ -14,6 +14,9 @@ GF(ENDL, "\r\n");
 GF(HELP_CMD, "help");
 GF(SHOW_CMD, "show");
 
+constexpr auto BACKSPACE = uint8_t{0x7f};
+constexpr auto CTRL_C = uint8_t{0x03};
+
 template <class Uart>
 class Terminal {
   public:
@@ -30,11 +33,11 @@ class Terminal {
 		bool handleInput = false;
 
 		while (m_serial.rxByte(inputByte)) {
-			if (isprint(inputByte) || inputByte == 0x03) {
+			if (isprint(inputByte) || inputByte == CTRL_C) {
 				m_inputBuffer[m_inputSize++] = inputByte;
 
 				// Handle Ctrl + C
-				if (inputByte == 0x03) {
+				if (inputByte == CTRL_C) {
 					m_serial << F("^C") << ENDL;
 					handleInput = true;
 					break;
@@ -46,8 +49,8 @@ class Terminal {
 			}
 
 			// Handle backspace
-			if (inputByte == 0x7f && m_inputSize > 0) {
-				m_serial << static_cast<char>(0x7f);
+			if (inputByte == BACKSPACE && m_inputSize > 0) {
+				m_serial << static_cast<char>(BACKSPACE);
 				--m_inputSize;
 			}
 			// Handle line terminator