diff --git a/lib/ace/mode/xquery_highlight_rules.js b/lib/ace/mode/xquery_highlight_rules.js
index c8d5ec93..6803c004 100644
--- a/lib/ace/mode/xquery_highlight_rules.js
+++ b/lib/ace/mode/xquery_highlight_rules.js
@@ -27,7 +27,7 @@ var XQueryHighlightRules = function() {
   var keywords = lang.arrayToMap(
     ("return|for|let|where|order|by|declare|function|variable|xquery|version|option|namespace|import|module|" +
      "switch|default|try|catch|group|tumbling|sliding|window|start|end|at|only|" +
-     "if|then|else|as|and|or|typeswitch|case|ascending|descending|empty|in").split("|")
+     "if|then|else|as|and|or|typeswitch|case|ascending|descending|empty|in|count").split("|")
     );
 
     // regexp must not have capturing parentheses