diff --git a/gtk/inspector/general.c b/gtk/inspector/general.c
index 0eab876b1e..56448bd161 100644
--- a/gtk/inspector/general.c
+++ b/gtk/inspector/general.c
@@ -639,6 +639,7 @@ add_wayland_protocols (GdkDisplay          *display,
       append_wayland_protocol_row (gen, (struct wl_proxy *)d->idle_inhibit_manager);
       append_wayland_protocol_row (gen, (struct wl_proxy *)d->xdg_activation);
       append_wayland_protocol_row (gen, (struct wl_proxy *)d->fractional_scale);
+      append_wayland_protocol_row (gen, (struct wl_proxy *)d->viewporter);
     }
 }
 #endif