diff --git a/src/lib/upnp/Device.cxx b/src/lib/upnp/Device.cxx
index b45e50762..3221642fd 100644
--- a/src/lib/upnp/Device.cxx
+++ b/src/lib/upnp/Device.cxx
@@ -79,7 +79,7 @@ protected:
 };
 
 void
-UPnPDevice::Parse(const std::string &url, const char *description)
+UPnPDevice::Parse(const std::string_view url, const char *description)
 {
 	{
 		UPnPDeviceParser mparser(*this);
diff --git a/src/lib/upnp/Device.hxx b/src/lib/upnp/Device.hxx
index 2488a41af..d0f739701 100644
--- a/src/lib/upnp/Device.hxx
+++ b/src/lib/upnp/Device.hxx
@@ -1,8 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 // Copyright The Music Player Daemon Project
 
-#ifndef _UPNPDEV_HXX_INCLUDED_
-#define _UPNPDEV_HXX_INCLUDED_
+#pragma once
 
 #include <vector>
 #include <string>
@@ -57,7 +56,5 @@ public:
 	 * @param url where the description came from
 	 * @param description the xml device description
 	 */
-	void Parse(const std::string &url, const char *description);
+	void Parse(std::string_view url, const char *description);
 };
-
-#endif /* _UPNPDEV_HXX_INCLUDED_ */
diff --git a/src/lib/upnp/Discovery.hxx b/src/lib/upnp/Discovery.hxx
index 2b106f51c..9fcaf4b2d 100644
--- a/src/lib/upnp/Discovery.hxx
+++ b/src/lib/upnp/Discovery.hxx
@@ -55,7 +55,7 @@ class UPnPDeviceDirectory final : UpnpCallback {
 			:id(std::move(_id)),
 			 expires(last + exp + std::chrono::seconds(20)) {}
 
-		void Parse(const std::string &url, const char *description) {
+		void Parse(std::string_view url, const char *description) {
 			device.Parse(url, description);
 		}
 	};