diff --git a/ddupdater b/ddupdater
index 1e017bb..8547467 100755
--- a/ddupdater
+++ b/ddupdater
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 readonly DOMAIN="play.noveria.org"
-readonly ROOTDIR="$(dirname $(readlink -f $0))"
+readonly ROOTDIR="$(dirname $(readlink -f $(which $0)))"
 readonly CONFIG="$ROOTDIR/config.json"
 readonly LOGFILE="/var/log/ddupdater.log"