From b5c2190b38b062b9ec09d404766a314648fbd8ad Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Wed, 26 Feb 2020 04:32:30 -0600
Subject: [PATCH] String optimize followup

---
 Marlin/src/sd/cardreader.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/src/sd/cardreader.cpp b/Marlin/src/sd/cardreader.cpp
index 2bde9501f..b2b0d90e9 100644
--- a/Marlin/src/sd/cardreader.cpp
+++ b/Marlin/src/sd/cardreader.cpp
@@ -521,7 +521,7 @@ void CardReader::openFileRead(char * const path, const uint8_t subcall_type/*=0*
     openFailed(fname);
 }
 
-inline void echo_write_to_file(char * const fname) {
+inline void echo_write_to_file(const char * const fname) {
   SERIAL_ECHOLNPAIR(STR_SD_WRITE_TO_FILE, fname);
 }