diff --git a/phpBB/phpbb/install/controller/install.php b/phpBB/phpbb/install/controller/install.php
index da806948fb..469e2608a4 100644
--- a/phpBB/phpbb/install/controller/install.php
+++ b/phpBB/phpbb/install/controller/install.php
@@ -167,6 +167,9 @@ class install
 				$installer->run();
 			});
 
+			// Try to bypass any server output buffers
+			$response->headers->set('X-Accel-Buffering', 'no');
+
 			return $response;
 		}
 		else