diff --git a/src/lib/platform/PortalRemoteDesktop.cpp b/src/lib/platform/PortalRemoteDesktop.cpp
index fa981949b..d49ccf8cb 100644
--- a/src/lib/platform/PortalRemoteDesktop.cpp
+++ b/src/lib/platform/PortalRemoteDesktop.cpp
@@ -245,7 +245,7 @@ void PortalRemoteDesktop::handleSelectionTransfer(XdpSession *session, const cha
 #endif
 }
 
-void PortalRemoteDesktop::handleSelectionOwnerChanged(XdpSession *session, char **mimeTypes, gboolean isOwner)
+void PortalRemoteDesktop::handleSelectionOwnerChanged(XdpSession *session, char **mimeTypes, gboolean isOwner) const
 {
 #ifdef HAVE_LIBPORTAL_CLIPBOARD
   if (isOwner) {
diff --git a/src/lib/platform/PortalRemoteDesktop.h b/src/lib/platform/PortalRemoteDesktop.h
index c679db69d..c988471d2 100644
--- a/src/lib/platform/PortalRemoteDesktop.h
+++ b/src/lib/platform/PortalRemoteDesktop.h
@@ -33,7 +33,7 @@ private:
   void handleSessionStarted(GObject *object, GAsyncResult *res);
   void handleSessionClosed(XdpSession *session);
   void handleSelectionTransfer(XdpSession *session, const char *mimeType, uint32_t serial);
-  void handleSelectionOwnerChanged(XdpSession *session, char **mimeTypes, gboolean isOwner);
+  void handleSelectionOwnerChanged(XdpSession *session, char **mimeTypes, gboolean isOwner) const;
   void reconnect(unsigned int timeout = 1000);
 
   static void handleSessionClosedCallback(XdpSession *session, gpointer data)