diff --git a/source/gui/widgets/treebox.cpp b/source/gui/widgets/treebox.cpp
index c70c4330..233099c6 100644
--- a/source/gui/widgets/treebox.cpp
+++ b/source/gui/widgets/treebox.cpp
@@ -1274,7 +1274,10 @@ namespace nana
 
 				item_proxy	item_proxy::operator++(int)
 				{
-					return sibling();
+					item_proxy ip(*this);
+					if(trigger_ && node_)
+						node_ = node_->next;
+					return ip;
 				}
 
 				item_proxy& item_proxy::operator*()