diff --git a/programs/emulator/chip8/readme.txt b/programs/emulator/chip8/readme.txt
index 611a50d01..37ff265f2 100644
--- a/programs/emulator/chip8/readme.txt
+++ b/programs/emulator/chip8/readme.txt
@@ -7,6 +7,6 @@ How to use:
 Open shell in current directory (in Eolite Ctrl+G).
 Type for example:
 
-chip8 roms/ibm.chip8
+chip8 roms/ibm.ch8
 
 P.S. ROMs from https://github.com/dmatlack/chip8/tree/master/roms