diff --git a/src/Processors/AugmentProperties.php b/src/Processors/AugmentProperties.php
index 25c7e69e..e430a93b 100644
--- a/src/Processors/AugmentProperties.php
+++ b/src/Processors/AugmentProperties.php
@@ -97,7 +97,7 @@ protected function augmentType(Analysis $analysis, OA\Property $property, Contex
             }
 
             // ok, so we possibly have a type or ref
-            if (!Generator::isDefault($property->ref) && $typeMatches[2] === '' && $property->nullable) {
+            if (!Generator::isDefault($property->ref) && $typeMatches[2] === '' && !Generator::isDefault($property->nullable) && $property->nullable) {
                 $refKey = $this->toRefKey($context, $type);
                 $property->oneOf = [
                     $schema = new OA\Schema([