diff --git a/net/samba4/files/samba.init b/net/samba4/files/samba.init
index 7cb2f66e75..b849a1cd37 100644
--- a/net/samba4/files/samba.init
+++ b/net/samba4/files/samba.init
@@ -26,7 +26,7 @@ smb_header() {
 	)
 
 	# we dont use netbios anymore as default and wsd/avahi is dns based
-	hostname="$(cat /proc/sys/kernel/hostname | tr -d '{};%?=#\n')"
+	hostname="$(sed 's/\..*//' /proc/sys/kernel/hostname | tr -d '{};%?=#\n')"
 
 	config_get_sane workgroup "$1" workgroup "WORKGROUP"
 	config_get_sane description "$1" description "Samba on OpenWrt"