diff --git a/include/exiftool.php b/include/exiftool.php
index 2fb1ed1..0f5faa6 100644
--- a/include/exiftool.php
+++ b/include/exiftool.php
@@ -55,7 +55,7 @@
 }
 if (isset($general['Duration']))
 {
-	$exif['duration'] = round($general['Duration']*1000, 0);
+	$exif['duration'] = round((int)$general['Duration']*1000, 0);
 }
 if (isset($general['TrackDuration']))
 {