diff --git a/rules/TypeDeclaration/Rector/ClassMethod/AddReturnTypeDeclarationRector.php b/rules/TypeDeclaration/Rector/ClassMethod/AddReturnTypeDeclarationRector.php
index 3f3960ae553..202d9bd9418 100644
--- a/rules/TypeDeclaration/Rector/ClassMethod/AddReturnTypeDeclarationRector.php
+++ b/rules/TypeDeclaration/Rector/ClassMethod/AddReturnTypeDeclarationRector.php
@@ -94,7 +94,17 @@ public function refactor(Node $node): ?Node
             return null;
         }
 
+        $classMethodNames = [];
+        foreach ($node->getMethods() as $classMethod) {
+            $classMethodNames[strtolower((string) $this->getName($classMethod))] = true;
+        }
+
         foreach ($this->methodReturnTypes as $methodReturnType) {
+            // cheap name check before the expensive type resolution below
+            if (! isset($classMethodNames[strtolower($methodReturnType->getMethod())])) {
+                continue;
+            }
+
             $objectType = $methodReturnType->getObjectType();
             if (! $this->isObjectType($node, $objectType)) {
                 continue;