diff --git a/lib/config.php b/lib/config.php
index b4165166d..76d3711c0 100644
--- a/lib/config.php
+++ b/lib/config.php
@@ -39,7 +39,7 @@
         ],
         'preview' => [
             'cmd' => 'gphoto2 --stdout --capture-movie | ffmpeg -i - -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video0 > /dev/null 2>&1 & echo $!',
-            'killcmd' => 'killall gphoto2',
+            'killcmd' => 'killall gphoto2 && sleep 1',
         ]
     ],
 ];