diff --git a/lib/specResolver.js b/lib/specResolver.js
index aea862d2..37177ecc 100644
--- a/lib/specResolver.js
+++ b/lib/specResolver.js
@@ -329,7 +329,7 @@ class SpecResolver {
     modelNames.forEach(function iterator(modelName) {
       let model = definitions[modelName];
       if (model) {
-        if (!model.additionalProperties || force) {
+        if (force || (!model.additionalProperties && (!(!model.properties || (model.properties && Object.keys(model.properties).length === 0))))) {
           model.additionalProperties = false;
         }
       }