diff --git a/core/color_codes.js b/core/color_codes.js
index 2032f057..e07b805e 100644
--- a/core/color_codes.js
+++ b/core/color_codes.js
@@ -110,7 +110,8 @@ function renegadeToAnsi(s, client) {
             result += s.substr(lastIndex, m.index - lastIndex) + attr;
         } else if(m[4] || m[1]) {
             //  |AA MCI code or |Cx## movement where ## is in m[1]
-            const val = getPredefinedMCIValue(client, m[4] || m[1], m[2]) || (m[0]);  //  value itself or literal
+            let val = getPredefinedMCIValue(client, m[4] || m[1], m[2]);
+            val = _.isString(val) ? val : m[0];  //  value itself or literal
             result += s.substr(lastIndex, m.index - lastIndex) + val;
         } else if(m[5]) {
             //  || -- literal '|', that is.
diff --git a/core/predefined_mci.js b/core/predefined_mci.js
index 9888ba5e..5a04ff07 100644
--- a/core/predefined_mci.js
+++ b/core/predefined_mci.js
@@ -95,7 +95,7 @@ const PREDEFINED_MCI_GENERATORS = {
     ST  : function serverName(client) { return client.session.serverName; },
     FN  : function activeFileBaseFilterName(client) {
         const activeFilter = FileBaseFilters.getActiveFilter(client);
-        return activeFilter ? activeFilter.name : '';
+        return activeFilter ? activeFilter.name : '(Unknown)';
     },
     DN  : function userNumDownloads(client) { return userStatAsString(client, 'dl_total_count', 0); },      //  Obv/2
     DK  : function userByteDownload(client) {   //  Obv/2 uses DK=downloaded Kbytes