diff --git a/lib/private/Image.php b/lib/private/Image.php
index d1a2f164ed52e..c812490032d87 100644
--- a/lib/private/Image.php
+++ b/lib/private/Image.php
@@ -279,7 +279,7 @@ private function _output(?string $filePath = null, ?string $mimeType = null): bo
 				$retVal = imagebmp($this->resource, $filePath);
 				break;
 			case IMAGETYPE_WEBP:
-				$retVal = imagewebp($this->resource, null, $this->getWebpQuality());
+				$retVal = imagewebp($this->resource, $filePath, $this->getWebpQuality());
 				break;
 			default:
 				$retVal = imagepng($this->resource, $filePath);