diff --git a/Dockerfile b/Dockerfile
index c90f9385..086897bb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,4 +23,4 @@ RUN adduser -u 1000 -H -D -G $username $username
 USER $username
 
 EXPOSE 5680
-CMD ["/usr/sbin/icinga-notifications", "--config", "/etc/icinga-notifications/config.yml"]
+CMD ["/usr/sbin/icinga-notifications"]
diff --git a/Makefile b/Makefile
index 3e7201c6..e41bbe51 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@ all:
 	mkdir -p build
 	go build \
 		-o build/ \
-		-ldflags "-X '$(pkg).LibExecDir=$(libexecdir)'" \
+		-ldflags "-X '$(pkg).LibExecDir=$(libexecdir)' -X '$(pkg).SysConfDir=$(sysconfdir)'" \
 		./cmd/icinga-notifications
 	go build -o build/channel/ ./cmd/channel/...
 
diff --git a/cmd/icinga-notifications/main.go b/cmd/icinga-notifications/main.go
index 23d0bfa7..3dea365f 100644
--- a/cmd/icinga-notifications/main.go
+++ b/cmd/icinga-notifications/main.go
@@ -26,7 +26,7 @@ func main() {
 	var configPath string
 	var showVersion bool
 
-	flag.StringVar(&configPath, "config", "", "path to config file")
+	flag.StringVar(&configPath, "config", internal.SysConfDir+"/icinga-notifications/config.yml", "path to config file")
 	flag.BoolVar(&showVersion, "version", false, "print version")
 	flag.Parse()
 
@@ -43,11 +43,6 @@ func main() {
 		return
 	}
 
-	if configPath == "" {
-		_, _ = fmt.Fprintln(os.Stderr, "missing -config flag")
-		os.Exit(1)
-	}
-
 	err := daemon.LoadConfig(configPath)
 	if err != nil {
 		_, _ = fmt.Fprintln(os.Stderr, "cannot load config:", err)
diff --git a/internal/paths.go b/internal/paths.go
index d7076f71..01f2681c 100644
--- a/internal/paths.go
+++ b/internal/paths.go
@@ -1,6 +1,7 @@
 package internal
 
-// This variable exists to allow overwriting the path using `go build -ldflags "-X ...", see Makefile.
+// These variables exist to allow overwriting the paths using `go build -ldflags "-X ...", see Makefile.
 var (
 	LibExecDir = "/usr/libexec"
+	SysConfDir = "/etc"
 )