diff --git a/src/ObjectReflection.php b/src/ObjectReflection.php
index 276c152..661a0ff 100644
--- a/src/ObjectReflection.php
+++ b/src/ObjectReflection.php
@@ -157,7 +157,7 @@ class ObjectReflection {
                 $parameters[$parameter->getName()] = [
                     'null' => $parameter->allowsNull(),
                     'position' => $parameter->getPosition(),
-                    'type' => $parameter->hasType() ? $parameter->getType()->getName() : false,
+                    'type' => $parameter->hasType() && $parameter->getType() instanceof \ReflectionNamedType ? $parameter->getType()->getName() : false,
                     'array' => $this->isType('array', $parameter),
                     'callable' => $this->isType('callable', $parameter),
                     'optional' => $parameter->isOptional(),