diff --git a/clite/core.js b/clite/core.js
index fbf04e9..2d40af3 100644
--- a/clite/core.js
+++ b/clite/core.js
@@ -2983,6 +2983,19 @@ clite.tty = {
 				case 8:
 					clite.tty.internal.write(id,String.fromCharCode(8));
 					break;
+				case 9:
+				{
+					var cr = clite.tty.getCursor(id);
+					if (Array.isArray(cr)) {
+						var m = 4-(cr[0]%4);
+						for (var j=0; j<m; j++) {
+							clite.tty.internal.write(id,' ');
+						}
+					}else{
+						clite.tty.internal.write(id,'^');
+					}
+					break;
+				}
 				case 10: // NL/LF to CR+LF
 					clite.tty.internal.write(id,String.fromCharCode(13));
 					clite.tty.internal.write(id,String.fromCharCode(10));