diff --git a/src/fe-gtk/maingui.c b/src/fe-gtk/maingui.c
index 3fc0b32d..e456ac4e 100644
--- a/src/fe-gtk/maingui.c
+++ b/src/fe-gtk/maingui.c
@@ -4616,8 +4616,18 @@ mg_drag_motion_cb (GtkWidget *widget, GdkDragContext *context, int x, int y, gui
 #if 0
         /* are both tree/userlist on the same side? */
         GtkPaned *paned;
-        paned = (GtkPaned *)widget->parent->parent;
-        if (paned->child1 != NULL && paned->child2 != NULL)
+        GtkWidget *parent;
+        GtkWidget *grandparent;
+        parent = gtk_widget_get_parent (widget);
+        grandparent = parent ? gtk_widget_get_parent (parent) : NULL;
+        paned = grandparent ? GTK_PANED (grandparent) : NULL;
+#if HAVE_GTK3
+        if (paned != NULL &&
+            gtk_paned_get_child1 (paned) != NULL &&
+            gtk_paned_get_child2 (paned) != NULL)
+#else
+        if (paned != NULL && paned->child1 != NULL && paned->child2 != NULL)
+#endif
         {
                 cairo_rectangle (cr, 1 + ox, 2 + oy, width - 3, height - 4);
                 cairo_rectangle (cr, 0 + ox, 1 + oy, width - 1, height - 2);