diff --git a/src/octoprint/static/js/app/viewmodels/terminal.js b/src/octoprint/static/js/app/viewmodels/terminal.js
index 45a3a254..b244bf8c 100644
--- a/src/octoprint/static/js/app/viewmodels/terminal.js
+++ b/src/octoprint/static/js/app/viewmodels/terminal.js
@@ -162,7 +162,8 @@ $(function() {
             }
 
 //            var re = /^([gmt][0-9]+)(\s.*)?/;
-			var re = /^([gmtfs][0-9]+|\$[cinhgx#$]|[?~!])(.*)?/; // grbl style
+			//          gcode words  | $ commands | RT  | /debug
+			var re = /^([gmtfs][0-9]+|\$[cinhgx#$]|[?~!]|\/)(.*)?/; // grbl style
             var commandMatch = command.match(re);
             if (commandMatch != null) {
                 command = commandMatch[1].toUpperCase() + ((commandMatch[2] !== undefined) ? commandMatch[2] : "");