diff --git a/lib/private/Preview/WebP.php b/lib/private/Preview/WebP.php
index 8f10a08206..d2172b1242 100644
--- a/lib/private/Preview/WebP.php
+++ b/lib/private/Preview/WebP.php
@@ -37,6 +37,6 @@ class WebP extends Image {
 	}
 
 	public function isAvailable(FileInfo $file): bool {
-		return (bool)(imagetypes() && IMG_WEBP);
+		return (bool)(imagetypes() & IMG_WEBP);
 	}
 }