diff --git a/src/Bundle/ChillDocGeneratorBundle/Serializer/Normalizer/DocGenObjectNormalizer.php b/src/Bundle/ChillDocGeneratorBundle/Serializer/Normalizer/DocGenObjectNormalizer.php
index 040738571..b57577848 100644
--- a/src/Bundle/ChillDocGeneratorBundle/Serializer/Normalizer/DocGenObjectNormalizer.php
+++ b/src/Bundle/ChillDocGeneratorBundle/Serializer/Normalizer/DocGenObjectNormalizer.php
@@ -86,19 +86,34 @@ class DocGenObjectNormalizer implements NormalizerAwareInterface, NormalizerInte
 
     private function getExpectedType(AttributeMetadata $attribute, ReflectionClass $reflection): string
     {
-        // we have to get the expected content
-        if ($reflection->hasProperty($attribute->getName())) {
-            $type = $reflection->getProperty($attribute->getName())->getType();
-        } elseif ($reflection->hasMethod($attribute->getName())) {
-            $type = $reflection->getMethod($attribute->getName())->getReturnType();
-        } else {
-            throw new \LogicException(sprintf(
-                'Could not determine how the content is determined for the attribute %s. Add attribute property only on property or method',
-                $attribute->getName()
-            ));
-        }
+        $type = null;
 
-        if (null === $type) {
+        do {
+            // we have to get the expected content
+            if ($reflection->hasProperty($attribute->getName())) {
+                if (!$reflection->getProperty($attribute->getName())->hasType()) {
+                    throw new \LogicException(sprintf(
+                        'Could not determine how the content is determined for the attribute %s. Add a type on this property',
+                        $attribute->getName()
+                    ));
+                }
+
+                $type = $reflection->getProperty($attribute->getName())->getType();
+            } elseif ($reflection->hasMethod($attribute->getName())) {
+                if (!$reflection->getMethod($attribute->getName())->hasReturnType()) {
+                    throw new \LogicException(sprintf(
+                        'Could not determine how the content is determined for the attribute %s. Add a return type on the method',
+                        $attribute->getName()
+                    ));
+                }
+
+                $type = $reflection->getMethod($attribute->getName())->getReturnType();
+            } else {
+                $reflection = $reflection->getParentClass();
+            }
+        } while (null === $type && $reflection instanceof ReflectionClass);
+
+        if (null === $type ?? null) {
             throw new \LogicException(sprintf(
                 'Could not determine the type for this attribute: %s. Add a return type to the method or property declaration',
                 $attribute->getName()