diff --git a/components/property_info.rst b/components/property_info.rst
index 4eab1ee13c5..6a06ab46200 100644
--- a/components/property_info.rst
+++ b/components/property_info.rst
@@ -370,6 +370,9 @@ Using PHP reflection, the :class:`Symfony\\Component\\PropertyInfo\\Extractor\\R
 provides list, type and access information from setter and accessor methods.
 It can also give the type of a property, and if it is initializable through the
 constructor. It supports return and scalar types for PHP 7.
+The component is also able to extract the types of the constructor's parameters.
+If the class is a sub-class, then the constructor's properties of the parent
+superclass are extracted.
 
 .. note::
 
@@ -399,9 +402,15 @@ constructor. It supports return and scalar types for PHP 7.
     $reflectionExtractor->isReadable($class, $property);
     $reflectionExtractor->isWritable($class, $property);
 
-    // Initializable information
+    // Initializable information.
     $reflectionExtractor->isInitializable($class, $property);
 
+    // Constructor type information.
+    $reflectionExtractor->extractFromConstructor($class, $property);
+    $reflectionExtractor->getTypes($class, $property, [
+        'enable_constructor_extraction' => true
+    ]);
+
 PhpDocExtractor
 ~~~~~~~~~~~~~~~