diff --git a/cmd/dwelling-home/main.go b/cmd/dwelling-home/main.go
index 5836dfe..71994cc 100644
--- a/cmd/dwelling-home/main.go
+++ b/cmd/dwelling-home/main.go
@@ -42,6 +42,8 @@ func main() {
 		ap, err := netip.ParseAddrPort(*listenAddress)
 		if err != nil {
 			log.Fatalln(err)
+		} else if !ap.IsValid() {
+			log.Fatalln(*listenAddress, "is not valid")
 		}
 
 		if ap.Addr().Is4() {