diff --git a/Microsoft.RestApi.RestTransformer/RestOperationTransformer.cs b/Microsoft.RestApi.RestTransformer/RestOperationTransformer.cs
index d55f43d..94d5ab8 100644
--- a/Microsoft.RestApi.RestTransformer/RestOperationTransformer.cs
+++ b/Microsoft.RestApi.RestTransformer/RestOperationTransformer.cs
@@ -1369,7 +1369,21 @@ private static void ResolveObject(string key, JObject nodeObject, DefinitionObje
                 {
                     definitionObject.IsRequired = true;
                 }
-                var requiredProperties = nodeObjectDict.GetArrayFromMetaData<string>("required");
+                var requiredProperties = nodeObjectDict.GetArrayFromMetaData<string>("required");
+
+                if (requiredFields != null)
+                {
+                    if (requiredProperties == null)
+                    {
+                        requiredProperties = requiredFields;
+                    }
+                    else
+                    {
+                        var requiredPropertiesList = requiredProperties.ToList();
+                        requiredPropertiesList.AddRange(requiredFields.ToList());
+                        requiredProperties = requiredPropertiesList.ToArray();
+                    }
+                }
 
                 definitionObject.DiscriminatorKey = nodeObjectDict.GetValueFromMetaData<string>("discriminator");
                 definitionObject.DiscriminatorValue = nodeObjectDict.GetValueFromMetaData<string>("x-ms-discriminator-value");