diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 9ac963d1b..55c2fe85a 100755
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -796,7 +796,7 @@ extern "C" {
   extern void digipot_i2c_init();
 #endif
 
-inline void echo_command(char * const cmd) {
+inline void echo_command(const char* cmd) {
   SERIAL_ECHO_START;
   SERIAL_ECHOPAIR(MSG_ENQUEUEING, cmd);
   SERIAL_CHAR('"');