diff --git a/xfce4-session/xfsm-properties.c b/xfce4-session/xfsm-properties.c
index 45243dd..f194822 100644
--- a/xfce4-session/xfsm-properties.c
+++ b/xfce4-session/xfsm-properties.c
@@ -188,7 +188,7 @@ xfsm_properties_new (const gchar *client_id,
 {
   XfsmProperties *properties;
   
-  properties = g_slice_new0 (XfsmProperties);
+  properties = g_new0 (XfsmProperties, 1);
   properties->client_id = g_strdup (client_id);
   properties->hostname  = g_strdup (hostname);
   properties->pid       = -1;
@@ -722,5 +722,5 @@ xfsm_properties_free (XfsmProperties *properties)
 
   g_tree_destroy (properties->sm_properties);
 
-  g_slice_free (XfsmProperties, properties);
+  g_free (properties);
 }