diff --git a/LazyProxy/PhpDumper/LazyLoadingValueHolderGenerator.php b/LazyProxy/PhpDumper/LazyLoadingValueHolderGenerator.php
index d4ce682..8ec2993 100644
--- a/LazyProxy/PhpDumper/LazyLoadingValueHolderGenerator.php
+++ b/LazyProxy/PhpDumper/LazyLoadingValueHolderGenerator.php
@@ -32,7 +32,7 @@ public function generate(\ReflectionClass $originalClass, ClassGenerator $classG
             $newBody = preg_replace('/^(\$this->initializer[a-zA-Z0-9]++) && .*;\n\nreturn (\$this->valueHolder)/', '$1 || $2', $body);
 
             if ($body === $newBody) {
-                throw new \UnexpectedValueException(sprintf('Unexpected lazy-proxy format generated for method %s::__destruct().', $originalClass->name));
+                throw new \UnexpectedValueException(sprintf('Unexpected lazy-proxy format generated for method "%s::__destruct()".', $originalClass->name));
             }
 
             $destructor->setBody($newBody);