diff --git a/lib/private/Streamer.php b/lib/private/Streamer.php
index 0e3018f77b7f7..6b5507cb9acdd 100644
--- a/lib/private/Streamer.php
+++ b/lib/private/Streamer.php
@@ -95,6 +95,7 @@ public function __construct(IRequest $request, int $size, int $numberOfFiles) {
 	 * @param string $name
 	 */
 	public function sendHeaders($name) {
+		header('X-Accel-Buffering: no');
 		$extension = $this->streamerInstance instanceof ZipStreamer ? '.zip' : '.tar';
 		$fullName = $name . $extension;
 		$this->streamerInstance->sendHeaders($fullName);
diff --git a/lib/private/legacy/OC_Files.php b/lib/private/legacy/OC_Files.php
index addee2358dd2c..52dd7593738af 100644
--- a/lib/private/legacy/OC_Files.php
+++ b/lib/private/legacy/OC_Files.php
@@ -98,6 +98,7 @@ private static function sendHeaders($filename, $name, array $rangeArray) {
 			}
 		}
 		header('Content-Type: '.$type, true);
+		header('X-Accel-Buffering: no');
 	}
 
 	/**