diff --git a/app/assets/javascripts/angular/controllers/experiments.js b/app/assets/javascripts/angular/controllers/experiments.js
index 80e55582..b45bb16c 100644
--- a/app/assets/javascripts/angular/controllers/experiments.js
+++ b/app/assets/javascripts/angular/controllers/experiments.js
@@ -265,7 +265,7 @@
                 lowestCode = lowestCodes[1];
             }
 
-            if (lowestCode.length !== 2) {
+            if (!lowestCode || lowestCode.length !== 2) {
                 throw "Experiment configuration incorrect";
             }