diff --git a/src/Psalm/Internal/PhpVisitor/SimpleNameResolver.php b/src/Psalm/Internal/PhpVisitor/SimpleNameResolver.php
index 133fe825584..04d41daa332 100644
--- a/src/Psalm/Internal/PhpVisitor/SimpleNameResolver.php
+++ b/src/Psalm/Internal/PhpVisitor/SimpleNameResolver.php
@@ -175,7 +175,7 @@ private function resolveSignature(PhpParser\NodeAbstract $node): void
      */
     private function resolveType(?Node $node): ?Node
     {
-        if ($node instanceof Node\NullableType) {
+        if ($node instanceof NullableType) {
             $node->type = $this->resolveType($node->type);
 
             return $node;