diff --git a/workspace/core_include/wnd.h b/workspace/core_include/wnd.h
index 195c899..8e29836 100644
--- a/workspace/core_include/wnd.h
+++ b/workspace/core_include/wnd.h
@@ -142,7 +142,7 @@ class c_wnd : public c_cmd_target
 			c_wnd* child = m_top_child;
 			if (0 != child)
 			{
-				while (child)
+				while (child && child->m_parent == this)
 				{
 					child->show_window();
 					child = child->m_next_sibling;