diff --git a/gtk/gtktoolbar.c b/gtk/gtktoolbar.c
index ffded91c29..b75a1c9e6b 100644
--- a/gtk/gtktoolbar.c
+++ b/gtk/gtktoolbar.c
@@ -1005,7 +1005,10 @@ gtk_toolbar_begin_sliding (GtkToolbar *toolbar)
       g_source_set_name_by_id (priv->idle_id, "[gtk+] slide_idle_handler");
     }
 
-  gtk_widget_get_own_allocation (widget, &content_allocation);
+  content_allocation.x = 0;
+  content_allocation.y = 0;
+  content_allocation.width = gtk_widget_get_width (widget);
+  content_allocation.height = gtk_widget_get_height (widget);
 
   rtl = (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
   vertical = (priv->orientation == GTK_ORIENTATION_VERTICAL);
@@ -1021,9 +1024,6 @@ gtk_toolbar_begin_sliding (GtkToolbar *toolbar)
       cur_y = 0;
     }
 
-  cur_x += content_allocation.x;
-  cur_y += content_allocation.y;
-
   for (list = priv->content; list != NULL; list = list->next)
     {
       ToolbarContent *content = list->data;