diff --git a/src/lib/upnp/Discovery.cxx b/src/lib/upnp/Discovery.cxx
index eddd14487..f81ccd718 100644
--- a/src/lib/upnp/Discovery.cxx
+++ b/src/lib/upnp/Discovery.cxx
@@ -210,7 +210,7 @@ UPnPDeviceDirectory::LockAdd(ContentDirectoryDescriptor &&d) noexcept
 }
 
 inline void
-UPnPDeviceDirectory::LockRemove(const std::string &id) noexcept
+UPnPDeviceDirectory::LockRemove(const std::string_view id) noexcept
 {
 	const std::scoped_lock<Mutex> protect(mutex);
 
diff --git a/src/lib/upnp/Discovery.hxx b/src/lib/upnp/Discovery.hxx
index 4393304d6..4d6ecc034 100644
--- a/src/lib/upnp/Discovery.hxx
+++ b/src/lib/upnp/Discovery.hxx
@@ -98,7 +98,7 @@ private:
 	void ExpireDevices() noexcept;
 
 	void LockAdd(ContentDirectoryDescriptor &&d) noexcept;
-	void LockRemove(const std::string &id) noexcept;
+	void LockRemove(std::string_view id) noexcept;
 
 	int OnAlive(const UpnpDiscovery *disco) noexcept;
 	int OnByeBye(const UpnpDiscovery *disco) noexcept;