diff --git a/src/Closures/NoParameterWithNullableTypeDeclarationRule.php b/src/Closures/NoParameterWithNullableTypeDeclarationRule.php
index 13ea6804..17f0f16c 100644
--- a/src/Closures/NoParameterWithNullableTypeDeclarationRule.php
+++ b/src/Closures/NoParameterWithNullableTypeDeclarationRule.php
@@ -37,7 +37,7 @@ public function processNode(
         }
 
         $parametersWithNullableTypeDeclaration = \array_filter($node->params, static function (Node\Param $node): bool {
-            return self::isNullable($node);
+            return self::hasNullableTypeDeclaration($node);
         });
 
         if (0 === \count($parametersWithNullableTypeDeclaration)) {
@@ -62,7 +62,7 @@ public function processNode(
         }, $parametersWithNullableTypeDeclaration));
     }
 
-    private static function isNullable(Node\Param $node): bool
+    private static function hasNullableTypeDeclaration(Node\Param $node): bool
     {
         if ($node->type instanceof Node\NullableType) {
             return true;