diff --git a/lutin_etktest.py b/lutin_etktest.py
index 8fc0bf0..2b8ea72 100644
--- a/lutin_etktest.py
+++ b/lutin_etktest.py
@@ -17,6 +17,8 @@ def create(target):
 	
 	myModule.add_module_depend(['etk'])
 	
+	#myModule.compile_flags_XX(["-nostdinc++"]);
+	
 	# add the currrent module at the system
 	return myModule
 
diff --git a/test/main.cpp b/test/main.cpp
index a5a2331..04b6b90 100644
--- a/test/main.cpp
+++ b/test/main.cpp
@@ -16,6 +16,7 @@
 #include <etk/log.h>
 #include <etk/Color.h>
 #include <etk/RegExp.h>
+#include <etk/stdTools.h>
 #include <string>
 #include <regex>
 
@@ -346,6 +347,16 @@ void testRegExp() {
 		}
 		
 	}
+	
+	{
+		const std::u32string data = utf8::convertUnicode("kjhkjhk");
+		const std::u32string data2(U"kjhkjhk");
+		const std::string data3("kjhkjhk");
+		const char32_t data5[] = U"kjhkjhk";
+		//std::basic_regex<char32_t, std::u32string> regexp(data2);
+		//std::basic_regex<char32_t> regexp((const char32_t*)data2.c_str());
+		std::basic_regex<char32_t> regexp2(data5);
+	}
 }
 
 int main(int argc, const char *argv[]) {