diff --git a/doc/ruleSets/PSR12.rst b/doc/ruleSets/PSR12.rst
index 2595a1b0299..147bc2713d5 100644
--- a/doc/ruleSets/PSR12.rst
+++ b/doc/ruleSets/PSR12.rst
@@ -14,7 +14,7 @@ Rules
   ``['allow_single_line_anonymous_class_with_empty_body' => true]``
 - `class_definition <./../rules/class_notation/class_definition.rst>`_
   config:
-  ``['space_before_parenthesis' => true]``
+  ``['fix_constructor_arguments' => false, 'space_before_parenthesis' => true]``
 - `compact_nullable_typehint <./../rules/whitespace/compact_nullable_typehint.rst>`_
 - `declare_equal_normalize <./../rules/language_construct/declare_equal_normalize.rst>`_
 - `lowercase_cast <./../rules/cast_notation/lowercase_cast.rst>`_
diff --git a/doc/rules/class_notation/class_definition.rst b/doc/rules/class_notation/class_definition.rst
index 9499ee363bb..2404ecfe84c 100644
--- a/doc/rules/class_notation/class_definition.rst
+++ b/doc/rules/class_notation/class_definition.rst
@@ -175,7 +175,7 @@ The rule is part of the following rule sets:
 @PSR12
   Using the `@PSR12 <./../../ruleSets/PSR12.rst>`_ rule set will enable the ``class_definition`` rule with the config below:
 
-  ``['space_before_parenthesis' => true]``
+  ``['fix_constructor_arguments' => false, 'space_before_parenthesis' => true]``
 
 @PSR2
   Using the `@PSR2 <./../../ruleSets/PSR2.rst>`_ rule set will enable the ``class_definition`` rule with the default config.
diff --git a/src/RuleSet/Sets/PSR12Set.php b/src/RuleSet/Sets/PSR12Set.php
index 9a8e4c1bf1e..7311ea12502 100644
--- a/src/RuleSet/Sets/PSR12Set.php
+++ b/src/RuleSet/Sets/PSR12Set.php
@@ -29,7 +29,10 @@ public function getRules(): array
             'braces' => [
                 'allow_single_line_anonymous_class_with_empty_body' => true,
             ],
-            'class_definition' => ['space_before_parenthesis' => true], // defined in PSR12 ¶8. Anonymous Classes
+            'class_definition' => [
+                'fix_constructor_arguments' => false, // handled by method_argument_space fixer
+                'space_before_parenthesis' => true, // defined in PSR12 ¶8. Anonymous Classes
+            ],
             'compact_nullable_typehint' => true,
             'declare_equal_normalize' => true,
             'lowercase_cast' => true,