diff --git a/Code/thermal_printer/README.md b/Code/thermal_printer/README.md
index 77c601b..849038d 100644
--- a/Code/thermal_printer/README.md
+++ b/Code/thermal_printer/README.md
@@ -2,7 +2,7 @@
 
 `echo -e “Hello DevTerm\n\n\n\n\n\n” > /tmp/DEVTERM_PRINTER_IN`
 
-`cat xxx.txt > /tmp/DEVTERM_PRINTER_IN`
+`cat file.txt > /tmp/DEVTERM_PRINTER_IN`
 
 ### Eos/Pos commands example