diff --git a/source/detail/platform_spec_posix.cpp b/source/detail/platform_spec_posix.cpp
index f7cbc9d6..cad5b82e 100644
--- a/source/detail/platform_spec_posix.cpp
+++ b/source/detail/platform_spec_posix.cpp
@@ -27,7 +27,6 @@
 #include <algorithm>
 #include <nana/paint/graphics.hpp>
 #include <nana/gui/detail/bedrock.hpp>
-#include <nana/gui/detail/basic_window.hpp>
 #include <nana/gui/detail/window_manager.hpp>
 #include <nana/system/platform.hpp>
 #include <nana/paint/pixel_buffer.hpp>
@@ -35,6 +34,7 @@
 #include <sstream>
 
 #include "posix/msg_dispatcher.hpp"
+#include "../gui/detail/basic_window.hpp"
 
 namespace nana
 {
@@ -95,7 +95,7 @@ namespace detail
 			return std::string();
 		}
 	//end class conf
-
+#if 0
 	//class charset_conv
 		charset_conv::charset_conv(const char* tocode, const char* fromcode)
 		{
@@ -140,6 +140,7 @@ namespace detail
 			return rstr;
 		}
 	//end class charset_conv
+#endif
 #endif
 
 	//Caret implementation
@@ -338,16 +339,21 @@ namespace detail
 		string.tab_length = 4;
 		string.tab_pixels = 0;
 		string.whitespace_pixels = 0;
+
+#if 0 //deprecated
 #if defined(NANA_USE_XFT)
 		conv_.handle = ::iconv_open("UTF-8", NANA_UNICODE);
 		conv_.code = NANA_UNICODE;
+#endif
 #endif
 	}
 
 	drawable_impl_type::~drawable_impl_type()
 	{
+#if 0	//deprecated
 #if defined(NANA_USE_XFT)
 		::iconv_close(conv_.handle);
+#endif
 #endif
 	}
 
diff --git a/source/detail/posix/platform_spec.hpp b/source/detail/posix/platform_spec.hpp
index 84c1c24e..9c21625c 100644
--- a/source/detail/posix/platform_spec.hpp
+++ b/source/detail/posix/platform_spec.hpp
@@ -42,7 +42,7 @@
 
 #if defined(NANA_USE_XFT)
 	#include <X11/Xft/Xft.h>
-	#include <iconv.h>
+//	#include <iconv.h>	//deprecated
 	#include <fstream>
 #endif
 
@@ -63,6 +63,7 @@ namespace detail
 		std::ifstream ifs_;
 	};
 
+#if 0 //deprecated
 	class charset_conv
 	{
 		charset_conv(const charset_conv&) = delete;
@@ -75,6 +76,7 @@ namespace detail
 	private:
 		iconv_t handle_;
 	};
+#endif
 #endif
 
 	struct drawable_impl_type
@@ -118,12 +120,14 @@ namespace detail
 		unsigned color_{ 0xFFFFFFFF };
 		unsigned text_color_{ 0xFFFFFFFF };
 
+#if 0 //deprecated
 #if defined(NANA_USE_XFT)
 		struct conv_tag
 		{
 			iconv_t handle;
 			std::string code;
 		}conv_;
+#endif
 #endif
 	};
 
diff --git a/source/gui/detail/bedrock_posix.cpp b/source/gui/detail/bedrock_posix.cpp
index 69c49efa..6ad96318 100644
--- a/source/gui/detail/bedrock_posix.cpp
+++ b/source/gui/detail/bedrock_posix.cpp
@@ -512,11 +512,16 @@ namespace detail
 
 		auto const native_window = rruntime->window->root;
 		
-
+#if 0	//deprecated
 		nana::detail::charset_conv charset(NANA_UNICODE, "UTF-8");
 		const std::string& str = charset.charset(std::string(keybuf, keybuf + keybuf_len));
 		auto const charbuf = reinterpret_cast<const wchar_t*>(str.c_str());
 		auto const len = str.size() / sizeof(wchar_t);
+#else
+		auto wstr = nana::to_wstring(std::string{keybuf, keybuf + keybuf_len});
+		auto const charbuf = wstr.c_str();
+		auto const len = wstr.length();
+#endif
 
 		for(std::size_t i = 0; i < len; ++i)
 		{
diff --git a/source/system/dataexch.cpp b/source/system/dataexch.cpp
index b3f4d5d4..6628132a 100644
--- a/source/system/dataexch.cpp
+++ b/source/system/dataexch.cpp
@@ -20,9 +20,9 @@
 #if defined(NANA_WINDOWS)
 #	include <windows.h>
 #elif defined(NANA_X11)
-#	include "../detail/platform_spec_selector.hpp"
 #	include <nana/gui/detail/bedrock.hpp>
-#	include <nana/gui/detail/basic_window.hpp>
+#	include "../detail/platform_spec_selector.hpp"
+#	include "../gui/detail/basic_window.hpp"
 #endif
 
 namespace nana{ namespace system{