diff --git a/xtrn/tw2/tw2.js b/xtrn/tw2/tw2.js
index c737bd6be87bbe3d03f2ca7702fcded52ecc090b..99e7873175bcf33a941eff15b8f45b8ef02484f3 100644
--- a/xtrn/tw2/tw2.js
+++ b/xtrn/tw2/tw2.js
@@ -2405,6 +2405,8 @@ InputFuncMainLoop:
 				case '\r':
 					break InputFuncMainLoop;
 				case '\x08':	/* Backspace */
+					if(pos==0)
+						break;
 					console.write('\x08 \x08');
 					str=str.substr(-1);
 					pos--;