diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php
index 4a141642d0009..5737fb02cd5ef 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php
@@ -18,6 +18,7 @@
 use Symfony\Component\PropertyInfo\Extractor\PhpDocExtractor;
 use Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy;
 use Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy;
+use Symfony\Component\PropertyInfo\Tests\Fixtures\PseudoTypeDummy;
 use Symfony\Component\PropertyInfo\Tests\Fixtures\TraitUsage\DummyUsedInTrait;
 use Symfony\Component\PropertyInfo\Tests\Fixtures\TraitUsage\DummyUsingTrait;
 use Symfony\Component\PropertyInfo\Type;
@@ -350,6 +351,11 @@ public function propertiesParentTypeProvider(): array
         ];
     }
 
+    public function testUnknownPseudoType()
+    {
+        $this->assertEquals([new Type(Type::BUILTIN_TYPE_OBJECT, false, 'scalar')], $this->extractor->getTypes(PseudoTypeDummy::class, 'unknownPseudoType'));
+    }
+
     protected function isPhpDocumentorV5()
     {
         if (class_exists(InvalidTag::class)) {
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/PseudoTypeDummy.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/PseudoTypeDummy.php
new file mode 100644
index 0000000000000..71756044fafc9
--- /dev/null
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/PseudoTypeDummy.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Symfony\Component\PropertyInfo\Tests\Fixtures;
+
+class PseudoTypeDummy
+{
+    /**
+     * @var scalar
+     */
+    public $unknownPseudoType;
+}
diff --git a/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php b/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
index dd8b48fde2b3b..71e3306c08b1f 100644
--- a/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
+++ b/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
@@ -164,6 +164,6 @@ private function getPhpTypeAndClass(string $docType): array
             return ['object', $docType];
         }
 
-        return ['object', substr($docType, 1)];
+        return ['object', ltrim($docType, '\\')];
     }
 }