diff --git a/phpBB/phpbb/di/container_builder.php b/phpBB/phpbb/di/container_builder.php
index ab10073013..553b723cc8 100644
--- a/phpBB/phpbb/di/container_builder.php
+++ b/phpBB/phpbb/di/container_builder.php
@@ -175,7 +175,7 @@ class container_builder
 				$this->container->compile();
 			}
 
-			if ($this->dump_container && !defined('DEBUG'))
+			if ($this->dump_container && !defined('DEBUG_CONTAINER'))
 			{
 				$this->dump_container($container_filename);
 			}