diff --git a/doc/ruleSets/Symfony.rst b/doc/ruleSets/Symfony.rst
index 03bce9d45f7..072008a555e 100644
--- a/doc/ruleSets/Symfony.rst
+++ b/doc/ruleSets/Symfony.rst
@@ -99,6 +99,7 @@ Rules
 - `no_useless_nullsafe_operator <./../rules/operator/no_useless_nullsafe_operator.rst>`_
 - `no_whitespace_before_comma_in_array <./../rules/array_notation/no_whitespace_before_comma_in_array.rst>`_
 - `normalize_index_brace <./../rules/array_notation/normalize_index_brace.rst>`_
+- `nullable_type_declaration <./../rules/language_construct/nullable_type_declaration.rst>`_
 - `nullable_type_declaration_for_default_null_value <./../rules/function_notation/nullable_type_declaration_for_default_null_value.rst>`_
 - `object_operator_without_whitespace <./../rules/operator/object_operator_without_whitespace.rst>`_
 - `operator_linebreak <./../rules/operator/operator_linebreak.rst>`_ with config:
diff --git a/doc/rules/language_construct/nullable_type_declaration.rst b/doc/rules/language_construct/nullable_type_declaration.rst
index dc9c518b32b..6c3171ce41c 100644
--- a/doc/rules/language_construct/nullable_type_declaration.rst
+++ b/doc/rules/language_construct/nullable_type_declaration.rst
@@ -66,6 +66,15 @@ With configuration: ``['syntax' => 'question_mark']``.
    +    public ?bool $internal;
    +    public ?\Closure $callback;
     }
+
+Rule sets
+---------
+
+The rule is part of the following rule sets:
+
+- `@PhpCsFixer <./../../ruleSets/PhpCsFixer.rst>`_
+- `@Symfony <./../../ruleSets/Symfony.rst>`_
+
 References
 ----------
 
diff --git a/src/RuleSet/Sets/SymfonySet.php b/src/RuleSet/Sets/SymfonySet.php
index 6a07fc3d6a0..1b4f38cdd9f 100644
--- a/src/RuleSet/Sets/SymfonySet.php
+++ b/src/RuleSet/Sets/SymfonySet.php
@@ -135,6 +135,7 @@ public function getRules(): array
             'no_useless_nullsafe_operator' => true,
             'no_whitespace_before_comma_in_array' => true,
             'normalize_index_brace' => true,
+            'nullable_type_declaration' => true,
             'nullable_type_declaration_for_default_null_value' => true,
             'object_operator_without_whitespace' => true,
             'operator_linebreak' => [
diff --git a/tests/Fixtures/Integration/misc/PHP8_2.test b/tests/Fixtures/Integration/misc/PHP8_2.test
index f4a75d90a3c..dea778cff9d 100644
--- a/tests/Fixtures/Integration/misc/PHP8_2.test
+++ b/tests/Fixtures/Integration/misc/PHP8_2.test
@@ -55,7 +55,7 @@ class FalseNull
     }
 }
 
-function falsyNull(null $n, false $f): null|false {}
+function falsyNull(null $n, false $f): ?false {}
 
 array_filter([], fn (null $n) => null === $n);
 array_filter([], fn (false $n) => false === $n);