diff --git a/src/helper/favicon.php b/src/helper/favicon.php
index bd1bdc9..8dfdba4 100644
--- a/src/helper/favicon.php
+++ b/src/helper/favicon.php
@@ -48,7 +48,8 @@ class MokoFaviconHelper
         $sourceTime = filemtime($sourcePath);
         $stampFile  = $outputDir . '/.favicon_generated';
 
-        if (is_file($stampFile) && filemtime($stampFile) >= $sourceTime) {
+        $manifestFile = $outputDir . '/site.webmanifest';
+        if (is_file($stampFile) && filemtime($stampFile) >= $sourceTime && is_file($manifestFile)) {
             return true;
         }