diff --git a/include/nana/gui/detail/basic_window.hpp b/include/nana/gui/detail/basic_window.hpp
index 280d015b..038acdbb 100644
--- a/include/nana/gui/detail/basic_window.hpp
+++ b/include/nana/gui/detail/basic_window.hpp
@@ -244,6 +244,7 @@ namespace detail
 			}attribute;
 
 			other_tag(category::flags);
+			~other_tag();
 		}other;
 
 		native_window_type	root;		    ///< root Window handle
diff --git a/source/deploy.cpp b/source/deploy.cpp
index 7f098148..7f715ef9 100644
--- a/source/deploy.cpp
+++ b/source/deploy.cpp
@@ -449,7 +449,7 @@ namespace std
 	//template<   >
 	std::string put_time/*<char, std::string>*/(const std::tm* tmb, const char* fmt)
 	{  
-		unsigned sz = 200;
+		std::size_t sz = 200;
 		std::string str(sz, '\0'); 
 		sz = std::strftime(&str[0], str.size() - 1, fmt, tmb);  
 		str.resize(sz);
diff --git a/source/gui/widgets/listbox.cpp b/source/gui/widgets/listbox.cpp
index 9c710901..8cf10cbc 100644
--- a/source/gui/widgets/listbox.cpp
+++ b/source/gui/widgets/listbox.cpp
@@ -2078,7 +2078,7 @@ namespace nana
 
 					unsigned x_offset() const
 					{
-						return (h.empty() ? 0 : h.value());
+						return static_cast<unsigned>(h.empty() ? 0 : h.value());
 					}
 
 					index_pair offset_y_abs, offset_y_dpl;	//cat stands for category, item stands for item. "item == npos" means that is a category.
diff --git a/source/gui/widgets/skeletons/text_editor.cpp b/source/gui/widgets/skeletons/text_editor.cpp
index 341fa22d..3062b445 100644
--- a/source/gui/widgets/skeletons/text_editor.cpp
+++ b/source/gui/widgets/skeletons/text_editor.cpp
@@ -3451,7 +3451,7 @@ namespace nana{	namespace widgets
 
 		unsigned text_editor::_m_char_by_pixels(const unicode_bidi::entity& ent, unsigned pos)
 		{
-			unsigned len = ent.end - ent.begin;
+			auto len = static_cast<std::size_t>(ent.end - ent.begin);
 
 			std::unique_ptr<unsigned[]> pxbuf(new unsigned[len]);
 			if (graph_.glyph_pixels(ent.begin, len, pxbuf.get()))
diff --git a/source/paint/text_renderer.cpp b/source/paint/text_renderer.cpp
index 1716b34c..825639c6 100644
--- a/source/paint/text_renderer.cpp
+++ b/source/paint/text_renderer.cpp
@@ -627,7 +627,7 @@ namespace nana
 			std::unique_ptr<unsigned[]> pixels(new unsigned[text.size()]);
 			graph_.glyph_pixels(text.c_str(), text.size(), pixels.get());
 
-			unsigned substr_len = 0;
+			std::size_t substr_len = 0;
 			unsigned substr_px = 0;
 
 			if (align::right == text_align_ex_)