diff --git a/src/raven.js b/src/raven.js
index 278bb0c410a7..3dd0684a3270 100644
--- a/src/raven.js
+++ b/src/raven.js
@@ -1800,7 +1800,7 @@ function htmlElementAsString(elem) {
 
     className = elem.className;
     if (className && isString(className)) {
-        classes = className.split(' ');
+        classes = className.split(/\s+/);
         for (i = 0; i < classes.length; i++) {
             out.push('.' + classes[i]);
         }