diff --git a/lib/model-helper.js b/lib/model-helper.js
index f32a412..b9b51e5 100644
--- a/lib/model-helper.js
+++ b/lib/model-helper.js
@@ -57,6 +57,10 @@ var modelHelper = module.exports = {
 
       // Eke a type out of the constructors we were passed.
       prop = modelHelper.LDLPropToSwaggerDataType(prop);
+      processType(modelClass.app, prop.type, out);
+      if (prop.items) {
+        processType(modelClass.app, prop.items.type, out);
+      }
 
       // Required props sit in a per-model array.
       if (prop.required || (prop.id && !prop.generated)) {