diff --git a/lib/private/Preview/Bundled.php b/lib/private/Preview/Bundled.php
index 812385c1672..bbe2fcf30ea 100644
--- a/lib/private/Preview/Bundled.php
+++ b/lib/private/Preview/Bundled.php
@@ -32,7 +32,7 @@ use OCP\IImage;
 abstract class Bundled extends ProviderV2 {
 	protected function extractThumbnail(File $file, string $path): ?IImage {
 
-		if ($file->getSize() == 0) {
+		if ($file->getSize() === 0) {
 			return null;
 		}