diff --git a/lib/chrome.js b/lib/chrome.js
index 108fdf4..e368ba1 100644
--- a/lib/chrome.js
+++ b/lib/chrome.js
@@ -349,7 +349,13 @@ var ChromeObject = function() {
         try {
             var responseText = this.evaluate(expression);
             console.info(responseText);
-            return JSON.parse(responseText).result.result.value;
+
+            var result = JSON.parse(responseText).result.result.value;
+            if (typeof(result) !== "undefined" && result != null) {
+                return result;
+            } else {
+                return "";
+            }
         } catch (e) {
             console.error("ChromeObject.getEvaluatedValue() ->", e.message);
             return "";