diff --git a/src/models.js b/src/models.js
index ca72f27..c6c6d95 100644
--- a/src/models.js
+++ b/src/models.js
@@ -63,7 +63,9 @@ module.exports = {
 
   addModelDependencies: function addModelDependencies(models, resource) {
     Object.keys(models).forEach(contentType => {
-      resource.DependsOn.add(`${models[contentType]}Model`);
+      if (typeof models[contentType] === 'string') {
+        resource.DependsOn.add(`${models[contentType]}Model`);
+      }
     });
   },