diff --git a/src/Symfony/Bridge/Doctrine/PropertyInfo/DoctrineExtractor.php b/src/Symfony/Bridge/Doctrine/PropertyInfo/DoctrineExtractor.php
index 6e8c29e16b..5446887abf 100644
--- a/src/Symfony/Bridge/Doctrine/PropertyInfo/DoctrineExtractor.php
+++ b/src/Symfony/Bridge/Doctrine/PropertyInfo/DoctrineExtractor.php
@@ -178,12 +178,12 @@ class DoctrineExtractor implements PropertyListExtractorInterface, PropertyTypeE
                 return Type::BUILTIN_TYPE_INT;
 
             case DBALType::FLOAT:
-            case DBALType::DECIMAL:
                 return Type::BUILTIN_TYPE_FLOAT;
 
             case DBALType::STRING:
             case DBALType::TEXT:
             case DBALType::GUID:
+            case DBALType::DECIMAL:
                 return Type::BUILTIN_TYPE_STRING;
 
             case DBALType::BOOLEAN:
diff --git a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
index 1bc57b1140..2224517db6 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
@@ -49,6 +49,8 @@ class DoctrineExtractorTest extends \PHPUnit_Framework_TestCase
                 'time',
                 'json',
                 'simpleArray',
+                'float',
+                'decimal',
                 'bool',
                 'binary',
                 'customFoo',
@@ -73,6 +75,8 @@ class DoctrineExtractorTest extends \PHPUnit_Framework_TestCase
         return array(
             array('id', array(new Type(Type::BUILTIN_TYPE_INT))),
             array('guid', array(new Type(Type::BUILTIN_TYPE_STRING))),
+            array('float', array(new Type(Type::BUILTIN_TYPE_FLOAT))),
+            array('decimal', array(new Type(Type::BUILTIN_TYPE_STRING))),
             array('bool', array(new Type(Type::BUILTIN_TYPE_BOOL))),
             array('binary', array(new Type(Type::BUILTIN_TYPE_RESOURCE))),
             array('json', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true))),
diff --git a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineDummy.php b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineDummy.php
index 317d14257b..e6d9155704 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineDummy.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineDummy.php
@@ -65,6 +65,16 @@ class DoctrineDummy
      */
     private $simpleArray;
 
+    /**
+     * @Column(type="float")
+     */
+    private $float;
+
+    /**
+     * @Column(type="decimal", precision=10, scale=2)
+     */
+    private $decimal;
+
     /**
      * @Column(type="boolean")
      */
diff --git a/src/Symfony/Component/Console/composer.json b/src/Symfony/Component/Console/composer.json
index dbc205c335..ed02e96cf4 100644
--- a/src/Symfony/Component/Console/composer.json
+++ b/src/Symfony/Component/Console/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": ">=5.5.9",
         "symfony/polyfill-mbstring": "~1.0",
-        "symfony/debug": "~2.7,>=2.7.2"
+        "symfony/debug": "~2.8|~3.0"
     },
     "require-dev": {
         "symfony/event-dispatcher": "~2.8|~3.0",
diff --git a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
index 63454a5b45..1d3d3a2083 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
@@ -231,7 +231,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
      */
     private function extractFromReflectionType(\ReflectionType $reflectionType)
     {
-        $phpTypeOrClass = (string) $reflectionType;
+        $phpTypeOrClass = method_exists($reflectionType, 'getName') ? $reflectionType->getName() : (string) $reflectionType;
         $nullable = $reflectionType->allowsNull();
 
         if ($reflectionType->isBuiltin()) {
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractors/ReflectionExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractors/ReflectionExtractorTest.php
index dfc13c025e..10b056220d 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractors/ReflectionExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractors/ReflectionExtractorTest.php
@@ -94,6 +94,25 @@ class ReflectionExtractorTest extends \PHPUnit_Framework_TestCase
         );
     }
 
+    /**
+     * @dataProvider php71TypesProvider
+     * @requires PHP 7.1
+     */
+    public function testExtractPhp71Type($property, array $type = null)
+    {
+        $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Php71Dummy', $property, array()));
+    }
+
+    public function php71TypesProvider()
+    {
+        return array(
+            array('foo', array(new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true))),
+            array('bar', array(new Type(Type::BUILTIN_TYPE_INT, true))),
+            array('baz', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING)))),
+            array('donotexist', null),
+        );
+    }
+
     public function testIsReadable()
     {
         $this->assertFalse($this->extractor->isReadable('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', 'bar', array()));
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php71Dummy.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php71Dummy.php
new file mode 100644
index 0000000000..d93c67a3d3
--- /dev/null
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php71Dummy.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\PropertyInfo\Tests\Fixtures;
+
+/**
+ * @author Teoh Han Hui <teohhanhui@gmail.com>
+ */
+class Php71Dummy
+{
+    public function getFoo(): ?array
+    {
+    }
+
+    public function setBar(?int $bar)
+    {
+    }
+
+    public function addBaz(string $baz)
+    {
+    }
+}