diff --git a/src/notification.c b/src/notification.c
index ebf092a..74af808 100644
--- a/src/notification.c
+++ b/src/notification.c
@@ -109,10 +109,11 @@ activate_action (GDBusConnection *connection,
                  gpointer data)
 {
   g_autofree char *object_path = NULL;
-  GVariantBuilder pdata, parms;
+  GVariantBuilder pdata_builder, parms;
+  g_autoptr(GVariant) pdata = NULL;
 
   object_path = app_path_for_id (app_id);
-  g_variant_builder_init (&pdata, G_VARIANT_TYPE_VARDICT);
+  g_variant_builder_init (&pdata_builder, G_VARIANT_TYPE_VARDICT);
   g_variant_builder_init (&parms, G_VARIANT_TYPE ("av"));
   if (parameter)
     g_variant_builder_add (&parms, "v", parameter);
@@ -120,13 +121,15 @@ activate_action (GDBusConnection *connection,
   if (activation_token)
     {
       /* Used by  `GTK` < 4.10 */
-      g_variant_builder_add (&pdata, "{sv}",
+      g_variant_builder_add (&pdata_builder, "{sv}",
                              "desktop-startup-id", g_variant_new_string (activation_token));
       /* Used by `GTK` and `QT` */
-      g_variant_builder_add (&pdata, "{sv}",
+      g_variant_builder_add (&pdata_builder, "{sv}",
                              "activation-token", g_variant_new_string (activation_token));
     }
 
+  pdata = g_variant_ref_sink (g_variant_builder_end (&pdata_builder));
+
   if (name && g_str_has_prefix (name, "app."))
     {
       g_dbus_connection_call (connection,
@@ -137,7 +140,7 @@ activate_action (GDBusConnection *connection,
                               g_variant_new ("(s@av@a{sv})",
                                              name + 4,
                                              g_variant_builder_end (&parms),
-                                             g_variant_builder_end (&pdata)),
+                                             pdata),
                               NULL,
                               G_DBUS_CALL_FLAGS_NONE,
                               -1, NULL, NULL, NULL);
@@ -151,12 +154,15 @@ activate_action (GDBusConnection *connection,
                               object_path,
                               "org.freedesktop.Application",
                               "Activate",
-                              g_variant_new ("(@a{sv})",
-                                             g_variant_builder_end (&pdata)),
+                              g_variant_new ("(@a{sv})", pdata),
                               NULL,
                               G_DBUS_CALL_FLAGS_NONE,
                               -1, NULL, NULL, NULL);
 
+      /* The application may not implement the `org.freedesktop.Application`, so
+       * add the platform data also to the `ActionInvoked` signal */
+      g_variant_builder_add (&parms, "v", pdata);
+
       g_dbus_connection_emit_signal (connection,
                                      NULL,
                                      "/org/freedesktop/portal/desktop",