diff --git a/docker/rootfs/start.sh b/docker/rootfs/start.sh
index aa51b21..a61b619 100644
--- a/docker/rootfs/start.sh
+++ b/docker/rootfs/start.sh
@@ -53,6 +53,7 @@ _buildConfig() {
     echo "define('FTP_BASEDIR', '${FTP_BASEDIR:-}');"
     echo "define('ENCRYPTION_KEY', '${ENCRYPTION_KEY:-}');"
     echo "define('FFMPEG_BINARY', '${FFMPEG_BINARY:-/usr/bin/ffmpeg}');"
+    echo "define('ALWAYS_WEBP', ${ALWAYS_WEBP:-false});"   
 }