diff --git a/Dockerfile b/Dockerfile
index d8f91e2..5b8dff8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
 FROM docker.io/memes/rrdtool:1.5.6
 COPY defaults.cfg /defaults.cfg
 COPY rrdsrv /rrdsrv
-ENTRYPOINT ["/rrdsrv","-c","/defaults.cfg"]
+ENTRYPOINT ["/rrdsrv","-config","/defaults.cfg"]