diff --git a/internal/agent/controller/app/server.go b/internal/agent/controller/app/server.go
index df34bcf..f22824b 100644
--- a/internal/agent/controller/app/server.go
+++ b/internal/agent/controller/app/server.go
@@ -178,7 +178,7 @@ func NewServer(bundle bundle.Bundle, config *spec.Config, handlerOptions ...edge
 func getCookieDomain(r *http.Request) (string, error) {
 	host, _, err := net.SplitHostPort(r.Host)
 	if err != nil {
-		return "", errors.WithStack(err)
+		host = r.Host
 	}
 
 	// If host is an IP address