diff --git a/software/script/chameleon_cli_main.py b/software/script/chameleon_cli_main.py
index 036bb0e..e330312 100644
--- a/software/script/chameleon_cli_main.py
+++ b/software/script/chameleon_cli_main.py
@@ -8,7 +8,10 @@ import chameleon_com
 import chameleon_cmd
 import colorama
 import chameleon_cli_unit
-
+import os
+ 
+if os.name == 'posix':
+   import readline
 
 ULTRA = r"""
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