diff --git a/hawk/modules/stack.js b/hawk/modules/stack.js
index b9d38393..43ce2ca2 100644
--- a/hawk/modules/stack.js
+++ b/hawk/modules/stack.js
@@ -35,6 +35,11 @@ module.exports = function () {
       }
 
       let matches = REGEXPS.CHROME_IE.exec(line);
+      if (!matches) {
+        return {
+          func: line
+        }
+      }
 
       return {
         func: matches[1],