diff --git a/src/backends/meta-monitor-config.c b/src/backends/meta-monitor-config.c
index f691e5423..21e3126f2 100644
--- a/src/backends/meta-monitor-config.c
+++ b/src/backends/meta-monitor-config.c
@@ -454,7 +454,7 @@ handle_end_element (GMarkupParseContext  *context,
       {
         if (strcmp (element_name, "configuration") == 0 && parser->unknown_count == 0)
           {
-            MetaConfiguration *config = g_slice_new (MetaConfiguration);
+            MetaConfiguration *config = config_new ();
 
             g_assert (parser->key_array->len == parser->output_array->len);