diff --git a/gio/gportalnotificationbackend.c b/gio/gportalnotificationbackend.c
index 819358f64..0c579adb1 100644
--- a/gio/gportalnotificationbackend.c
+++ b/gio/gportalnotificationbackend.c
@@ -799,6 +799,35 @@ serialize_display_hint (GNotification *notification)
   return g_variant_builder_end (&builder);
 }
 
+static GVariant *
+serialize_category (GNotification *notification)
+{
+  const char *category;
+  const char *supported_categories[] = {
+    G_NOTIFICATION_CATEGORY_IM_RECEIVED,
+    G_NOTIFICATION_CATEGORY_ALARM_RINGING,
+    G_NOTIFICATION_CATEGORY_CALL_INCOMING,
+    G_NOTIFICATION_CATEGORY_CALL_OUTGOING,
+    G_NOTIFICATION_CATEGORY_CALL_UNANSWERED,
+    G_NOTIFICATION_CATEGORY_WEATHER_WARNING_EXTREME,
+    G_NOTIFICATION_CATEGORY_CELLBROADCAST_DANGER_SEVERE,
+    G_NOTIFICATION_CATEGORY_CELLBROADCAST_AMBER_ALERT,
+    G_NOTIFICATION_CATEGORY_CELLBROADCAST_TEST,
+    G_NOTIFICATION_CATEGORY_OS_BATTERY_LOW,
+    G_NOTIFICATION_CATEGORY_BROWSER_WEB_NOTIFICATION,
+    NULL
+  };
+
+  category = g_notification_get_category (notification);
+
+  /* The portal fails if we give categories that aren't supported that
+   * don't start with the x-vendor prefix prefix */
+  if (category && (g_strv_contains (supported_categories, category) || g_str_has_prefix (category, "x-")))
+    return g_variant_new_string (category);
+
+  return NULL;
+}
+
 static void
 serialize_notification (const char          *id,
                         GNotification       *notification,
@@ -812,6 +841,7 @@ serialize_notification (const char          *id,
   const gchar *markup_body;
   GIcon *icon;
   GVariant *display_hint = NULL;
+  GVariant *category;
   gchar *default_action = NULL;
   GVariant *default_action_target = NULL;
   GVariant *buttons = NULL;
@@ -865,6 +895,9 @@ serialize_notification (const char          *id,
   if ((display_hint = serialize_display_hint (notification)))
     g_variant_builder_add (data->builder, "{sv}", "display-hint", display_hint);
 
+  if ((category = serialize_category (notification)))
+    g_variant_builder_add (data->builder, "{sv}", "category", category);
+
   if (g_notification_get_default_action (notification, &default_action, &default_action_target))
     {
       g_variant_builder_add (data->builder, "{sv}", "default-action",