diff --git a/src/lib/platform/PortalRemoteDesktop.cpp b/src/lib/platform/PortalRemoteDesktop.cpp
index d49ccf8cb..58fa28708 100644
--- a/src/lib/platform/PortalRemoteDesktop.cpp
+++ b/src/lib/platform/PortalRemoteDesktop.cpp
@@ -234,7 +234,7 @@ void PortalRemoteDesktop::claimClipboard() const
 #endif
 }
 
-void PortalRemoteDesktop::handleSelectionTransfer(XdpSession *session, const char *mimeType, uint32_t serial)
+void PortalRemoteDesktop::handleSelectionTransfer(XdpSession *session, const char *mimeType, uint32_t serial) const
 {
 #ifdef HAVE_LIBPORTAL_CLIPBOARD
   PortalClipboard::serveSelectionTransfer(m_screen->getClipboardCache(), session, mimeType, serial);
diff --git a/src/lib/platform/PortalRemoteDesktop.h b/src/lib/platform/PortalRemoteDesktop.h
index c988471d2..08a732065 100644
--- a/src/lib/platform/PortalRemoteDesktop.h
+++ b/src/lib/platform/PortalRemoteDesktop.h
@@ -32,7 +32,7 @@ private:
   void handleInitSession(GObject *object, GAsyncResult *res);
   void handleSessionStarted(GObject *object, GAsyncResult *res);
   void handleSessionClosed(XdpSession *session);
-  void handleSelectionTransfer(XdpSession *session, const char *mimeType, uint32_t serial);
+  void handleSelectionTransfer(XdpSession *session, const char *mimeType, uint32_t serial) const;
   void handleSelectionOwnerChanged(XdpSession *session, char **mimeTypes, gboolean isOwner) const;
   void reconnect(unsigned int timeout = 1000);