diff --git a/src/Generator/TypeGenerator.php b/src/Generator/TypeGenerator.php
index 3734a62c..3bbc7d3c 100644
--- a/src/Generator/TypeGenerator.php
+++ b/src/Generator/TypeGenerator.php
@@ -10,7 +10,6 @@
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
-use function array_merge;
 use function file_exists;
 use function file_put_contents;
 use function str_replace;
@@ -59,7 +58,7 @@ public function compile(int $mode): array
             $config['config']['name'] ??= $name;
             $config['config']['class_name'] = $config['class_name'];
             $classMap = $this->generateClass($config, $cacheDir, $mode);
-            $classes = array_merge($classes, $classMap);
+            $classes[$classMap[0]] = $classMap[1];
         }
 
         // Create class map file
@@ -97,7 +96,7 @@ public function generateClass(array $config, ?string $outputDirectory, int $mode
 
         $namespace = $this->options->namespace;
 
-        return ["$namespace\\$className" => $path];
+        return ["$namespace\\$className", $path];
     }
 
     public function loadClasses(bool $forceReload = false): void