diff --git a/CodeMirror-2.24/lib/util/match-highlighter.js b/CodeMirror-2.24/lib/util/match-highlighter.js
index b70cc4c..59098ff 100644
--- a/CodeMirror-2.24/lib/util/match-highlighter.js
+++ b/CodeMirror-2.24/lib/util/match-highlighter.js
@@ -23,7 +23,7 @@
   function markDocument(cm, className, minChars) {
     clearMarks(cm);
 	minChars = (typeof minChars !== 'undefined' ? minChars : DEFAULT_MIN_CHARS);
-	if (cm.somethingSelected() && cm.getSelection().length >= minChars) {
+	if (cm.somethingSelected() && cm.getSelection().replace(/^\s+|\s+$/g, "").length >= minChars) {
 		var state = getMatchHighlightState(cm);
 		var query = cm.getSelection();
 		cm.operation(function() {