diff --git a/lib/networks.js b/lib/networks.js
index 51062f0..5e47b6c 100644
--- a/lib/networks.js
+++ b/lib/networks.js
@@ -75,7 +75,7 @@ function addNetwork(data) {
   });
 
   _.each(_.values(network), function(value) {
-    if (!_.isObject(value)) {
+    if (value && !_.isObject(value)) {
       networkMaps[value] = network;
     }
   });