diff --git a/src/Reflection/ReflectionProvider/ClassBlacklistReflectionProvider.php b/src/Reflection/ReflectionProvider/ClassBlacklistReflectionProvider.php
index 05c957f18e..4b654c5aad 100644
--- a/src/Reflection/ReflectionProvider/ClassBlacklistReflectionProvider.php
+++ b/src/Reflection/ReflectionProvider/ClassBlacklistReflectionProvider.php
@@ -77,6 +77,7 @@ public function hasClass(string $className): bool
 			|| $classReflection->isSubclassOf(\DOMNamedNodeMap::class)
 			|| $classReflection->isSubclassOf(\DOMNodeList::class)
 			|| $classReflection->isSubclassOf(\DOMCharacterData::class)
+			|| $classReflection->isSubclassOf(\PDO::class)
 		) {
 			return false;
 		}