diff --git a/src/backends/meta-remote-desktop-session.c b/src/backends/meta-remote-desktop-session.c
index 512eda1fc..62e927ea2 100644
--- a/src/backends/meta-remote-desktop-session.c
+++ b/src/backends/meta-remote-desktop-session.c
@@ -567,6 +567,13 @@ meta_remote_desktop_session_acquire_mapping_id (MetaRemoteDesktopSession *sessio
     }
 }
 
+void
+meta_remote_desktop_session_release_mapping_id (MetaRemoteDesktopSession *session,
+                                                const char               *mapping_id)
+{
+  g_hash_table_remove (session->mapping_ids, mapping_id);
+}
+
 static gboolean
 check_permission (MetaRemoteDesktopSession *session,
                   GDBusMethodInvocation    *invocation)
diff --git a/src/backends/meta-remote-desktop-session.h b/src/backends/meta-remote-desktop-session.h
index 6555fc310..2c6405a4e 100644
--- a/src/backends/meta-remote-desktop-session.h
+++ b/src/backends/meta-remote-desktop-session.h
@@ -44,6 +44,9 @@ gboolean meta_remote_desktop_session_register_screen_cast (MetaRemoteDesktopSess
 
 const char * meta_remote_desktop_session_acquire_mapping_id (MetaRemoteDesktopSession *session);
 
+void meta_remote_desktop_session_release_mapping_id (MetaRemoteDesktopSession *session,
+                                                     const char               *mapping_id);
+
 void meta_remote_desktop_session_request_transfer (MetaRemoteDesktopSession  *session,
                                                    const char                *mime_type,
                                                    GTask                     *task);