diff --git a/clutter/clutter-model.c b/clutter/clutter-model.c
index d82ded1db..7bf2fb55f 100644
--- a/clutter/clutter-model.c
+++ b/clutter/clutter-model.c
@@ -1509,7 +1509,7 @@ clutter_model_foreach (ClutterModel            *model,
  */
 void
 clutter_model_set_sort (ClutterModel         *model,
-                        guint                 column,
+                        gint                  column,
                         ClutterModelSortFunc  func,
                         gpointer              user_data,
                         GDestroyNotify        notify)
diff --git a/clutter/clutter-model.h b/clutter/clutter-model.h
index 0a9e56d2a..a49ddbbbf 100644
--- a/clutter/clutter-model.h
+++ b/clutter/clutter-model.h
@@ -244,7 +244,7 @@ void                  clutter_model_foreach            (ClutterModel     *model,
                                                         ClutterModelForeachFunc func, 
                                                         gpointer          user_data);
 void                  clutter_model_set_sort           (ClutterModel     *model, 
-                                                        guint             column,
+                                                        gint              column,
                                                         ClutterModelSortFunc func, 
                                                         gpointer          user_data,
                                                         GDestroyNotify    notify);