diff --git a/grunt/bs-glyphicons-data-generator.js b/grunt/bs-glyphicons-data-generator.js
index 82dc727b6f..339fd0ffed 100644
--- a/grunt/bs-glyphicons-data-generator.js
+++ b/grunt/bs-glyphicons-data-generator.js
@@ -14,7 +14,7 @@ module.exports = function generateGlyphiconsData(grunt) {
   var glyphiconsLines = glyphiconsFile.split('\n');
 
   // Use any line that starts with ".glyphicon-" and capture the class name
-  var iconClassName = /^\.(glyphicon-[^\s]+)/;
+  var iconClassName = /^\.(glyphicon-[a-zA-Z0-9-]+)/;
   var glyphiconsData = '# This file is generated via Grunt task. **Do not edit directly.**\n' +
                        '# See the \'build-glyphicons-data\' task in Gruntfile.js.\n\n';
   var glyphiconsYml = 'docs/_data/glyphicons.yml';