diff --git a/ModelDescriber/JMSModelDescriber.php b/ModelDescriber/JMSModelDescriber.php
index a418779..d7d13e7 100644
--- a/ModelDescriber/JMSModelDescriber.php
+++ b/ModelDescriber/JMSModelDescriber.php
@@ -65,17 +65,28 @@ class JMSModelDescriber implements ModelDescriberInterface, ModelRegistryAwareIn
         $schema->setType('object');
         $properties = $schema->getProperties();
         foreach ($metadata->propertyMetadata as $item) {
-            if (null === $item->type) {
-                continue;
-            }
-
             // filter groups
             if (null !== $groupsExclusion && $groupsExclusion->shouldSkipProperty($item, SerializationContext::create())) {
                 continue;
             }
 
             $name = $this->namingStrategy->translateName($item);
-            $realProp = $property = $properties->get($name);
+            $property = $properties->get($name);
+
+            // read property options from Swagger Property annotation if it exists
+            if (null !== $item->reflection) {
+                if ($this->phpdocPropertyAnnotationsReader) {
+                    $this->phpdocPropertyAnnotationsReader->updateWithPhpdoc($item->reflection, $property);
+                }
+                $this->swaggerPropertyAnnotationReader->updateWithSwaggerPropertyAnnotation($item->reflection, $property);
+            }
+
+            if (null !== $property->getType()) {
+                continue;
+            }
+            if (null === $item->type) {
+                $properties->remove($name);
+            }
 
             if ($type = $this->getNestedTypeInArray($item)) {
                 $property->setType('array');
@@ -110,14 +121,6 @@ class JMSModelDescriber implements ModelDescriberInterface, ModelRegistryAwareIn
                     $this->modelRegistry->register(new Model(new Type(Type::BUILTIN_TYPE_OBJECT, false, $type), $groups))
                 );
             }
-
-            // read property options from Swagger Property annotation if it exists
-            if (null !== $item->reflection) {
-                if ($this->phpdocPropertyAnnotationsReader) {
-                    $this->phpdocPropertyAnnotationsReader->updateWithPhpdoc($item->reflection, $realProp);
-                }
-                $this->swaggerPropertyAnnotationReader->updateWithSwaggerPropertyAnnotation($item->reflection, $realProp);
-            }
         }
     }
 
diff --git a/ModelDescriber/ObjectModelDescriber.php b/ModelDescriber/ObjectModelDescriber.php
index bb6fad4..ee58483 100644
--- a/ModelDescriber/ObjectModelDescriber.php
+++ b/ModelDescriber/ObjectModelDescriber.php
@@ -51,6 +51,21 @@ class ObjectModelDescriber implements ModelDescriberInterface, ModelRegistryAwar
         }
 
         foreach ($propertyInfoProperties as $propertyName) {
+            $property = $properties->get($propertyName);
+
+            // read property options from Swagger Property annotation if it exists
+            if (property_exists($class, $propertyName)) {
+                $this->swaggerPropertyAnnotationReader->updateWithSwaggerPropertyAnnotation(
+                    new \ReflectionProperty($class, $propertyName),
+                    $property
+                );
+            }
+
+            // If type manually defined
+            if (null !== $property->getType()) {
+                continue;
+            }
+
             $types = $this->propertyInfo->getTypes($class, $propertyName);
             if (0 === count($types)) {
                 throw new \LogicException(sprintf('The PropertyInfo component was not able to guess the type of %s::$%s', $class, $propertyName));
@@ -60,10 +75,12 @@ class ObjectModelDescriber implements ModelDescriberInterface, ModelRegistryAwar
             }
 
             $type = $types[0];
-            $realProp = $property = $properties->get($propertyName);
-
             if (Type::BUILTIN_TYPE_ARRAY === $type->getBuiltinType()) {
                 $type = $type->getCollectionValueType();
+                if (null === $type) {
+                    throw new \LogicException(sprintf('Property "%s:%s" is an array, but no indication of the array elements are made. Use e.g. string[] for an array of string.', $class, $propertyName));
+                }
+
                 $property->setType('array');
                 $property = $property->getItems();
             }
@@ -89,14 +106,6 @@ class ObjectModelDescriber implements ModelDescriberInterface, ModelRegistryAwar
             } else {
                 throw new \Exception(sprintf('Unknown type: %s', $type->getBuiltinType()));
             }
-
-            // read property options from Swagger Property annotation if it exists
-            if (property_exists($class, $propertyName)) {
-                $this->swaggerPropertyAnnotationReader->updateWithSwaggerPropertyAnnotation(
-                    new \ReflectionProperty($class, $propertyName),
-                    $realProp
-                );
-            }
         }
     }
 
diff --git a/Tests/Functional/Entity/JMSUser.php b/Tests/Functional/Entity/JMSUser.php
index db0e760..07eb4fd 100644
--- a/Tests/Functional/Entity/JMSUser.php
+++ b/Tests/Functional/Entity/JMSUser.php
@@ -61,6 +61,12 @@ class JMSUser
      */
     private $password;
 
+    /**
+     * @SWG\Property(type="date")
+     * @Serializer\Expose
+     */
+    private $updatedAt;
+
     /**
      * Ignored as the JMS serializer can't detect its type.
      *
diff --git a/Tests/Functional/Entity/User.php b/Tests/Functional/Entity/User.php
index 68cc737..cf14a3e 100644
--- a/Tests/Functional/Entity/User.php
+++ b/Tests/Functional/Entity/User.php
@@ -26,9 +26,7 @@ class User
     private $id;
 
     /**
-     * @var string
-     *
-     * @SWG\Property(readOnly = false)
+     * @SWG\Property(type="string", readOnly = false)
      */
     private $email;
 
@@ -91,10 +89,7 @@ class User
         $this->id = $id;
     }
 
-    /**
-     * @param string $email
-     */
-    public function setEmail(string $email)
+    public function setEmail($email)
     {
         $this->email = $email;
     }
diff --git a/Tests/Functional/JMSFunctionalTest.php b/Tests/Functional/JMSFunctionalTest.php
index 4229833..e77a78f 100644
--- a/Tests/Functional/JMSFunctionalTest.php
+++ b/Tests/Functional/JMSFunctionalTest.php
@@ -59,6 +59,9 @@ class JMSFunctionalTest extends WebTestCase
                     'description' => 'Only enabled users may be used in actions.',
                     'enum' => ['disabled', 'enabled'],
                 ],
+                'updated_at' => [
+                    'type' => 'date',
+                ],
             ],
         ], $this->getModel('JMSUser')->toArray());
     }