diff --git a/Tools/MiniBrowser/gtk/BrowserSettingsDialog.c b/Tools/MiniBrowser/gtk/BrowserSettingsDialog.c
index ef000cd2b910..432c97257048 100644
--- a/Tools/MiniBrowser/gtk/BrowserSettingsDialog.c
+++ b/Tools/MiniBrowser/gtk/BrowserSettingsDialog.c
@@ -175,11 +175,12 @@ static void featureTreeViewRenderStatusData(GtkTreeViewColumn *column, GtkCellRe
 {
     g_autoptr(WebKitFeature) feature = NULL;
     gtk_tree_model_get(model, iter, FEATURES_LIST_COLUMN_FEATURE, &feature, -1);
-    g_autoptr(GEnumClass) enumClass = g_type_class_ref(WEBKIT_TYPE_FEATURE_STATUS);
+    GEnumClass *enumClass = g_type_class_ref(WEBKIT_TYPE_FEATURE_STATUS);
     g_object_set(renderer,
                  "markup", NULL,
                  "text", g_enum_get_value(enumClass, webkit_feature_get_status(feature))->value_nick,
                  NULL);
+    g_type_class_unref(enumClass);
 }
 
 static void featureTreeViewRenderCategoryData(GtkTreeViewColumn *column, GtkCellRenderer *renderer, GtkTreeModel *model, GtkTreeIter *iter, gpointer data)
diff --git a/Tools/MiniBrowser/gtk/main.c b/Tools/MiniBrowser/gtk/main.c
index 8be643a54151..ae82b41400b5 100644
--- a/Tools/MiniBrowser/gtk/main.c
+++ b/Tools/MiniBrowser/gtk/main.c
@@ -273,7 +273,7 @@ static gboolean parseFeaturesOptionCallback(const gchar *option, const gchar *va
                 "features, prefixes '-' and '!' disable features. Names are case-insensitive. Example:\n"
                 "\n    %s --features='!DirPseudo,+WebAnimationsCustomEffects,webgl'\n\n"
                 "Available features (+/- = enabled/disabled by default):\n\n", g_get_prgname());
-        g_autoptr(GEnumClass) statusEnum = g_type_class_ref(WEBKIT_TYPE_FEATURE_STATUS);
+        GEnumClass *statusEnum = g_type_class_ref(WEBKIT_TYPE_FEATURE_STATUS);
         for (gsize i = 0; i < webkit_feature_list_get_length(featureList); i++) {
             WebKitFeature *feature = webkit_feature_list_get(featureList, i);
             g_print("  %c %s (%s)",
@@ -284,6 +284,7 @@ static gboolean parseFeaturesOptionCallback(const gchar *option, const gchar *va
                 g_print(": %s", webkit_feature_get_name(feature));
             g_print("\n");
         }
+        g_type_class_unref(statusEnum);
         exit(EXIT_SUCCESS);
     }