diff --git a/source/gui/widgets/group.cpp b/source/gui/widgets/group.cpp
index e722a7b6..95e9428d 100644
--- a/source/gui/widgets/group.cpp
+++ b/source/gui/widgets/group.cpp
@@ -243,6 +243,7 @@ namespace nana{
 	{
 		impl_->caption.caption(std::move(str));
 		impl_->update_div();
+		impl_->place_content.collocate();
 	}
 }//end namespace nana