diff --git a/etk/math/Matrix.h b/etk/math/Matrix.h
index 9d4f184..3b956cd 100644
--- a/etk/math/Matrix.h
+++ b/etk/math/Matrix.h
@@ -402,7 +402,7 @@ namespace etk {
 			 * @return The absolute max value.
 			 */
 			T maxDifference(const Matrix<T>& _input) {
-				if (m_size != _input.m_size)
+				if (m_size != _input.m_size) {
 					TK_WARNING("better to do with same size Matrix");
 				}
 				T max = 0;
diff --git a/etk/math/Vector2D.h b/etk/math/Vector2D.h
index bf3ebd7..96208ee 100644
--- a/etk/math/Vector2D.h
+++ b/etk/math/Vector2D.h
@@ -400,11 +400,11 @@ namespace etk {
 	std::ostream& operator <<(std::ostream& _os, const etk::Vector2D<bool>& _obj);
 };
 // To siplify the writing of the code ==> this permit to have the same name with the glsl language...
-typedef etk::Vector2D<float>      vec2;
-typedef etk::Vector2D<int32_t>   ivec2;
+using   vec2 = etk::Vector2D<float>;
+using  ivec2 = etk::Vector2D<int32_t>;
 // not compatible with glsl ... but it is better to have a same writing
-typedef etk::Vector2D<uint32_t> uivec2;
-typedef etk::Vector2D<bool>      bvec2;
+using uivec2 = etk::Vector2D<uint32_t>;
+using  bvec2 = etk::Vector2D<bool>;
 
 inline vec2 vec2ClipInt32(const vec2& _val) {
 	return vec2((int32_t)_val.x(), (int32_t)_val.y());
diff --git a/etk/types.h b/etk/types.h
index 16e0d61..569e00c 100644
--- a/etk/types.h
+++ b/etk/types.h
@@ -41,10 +41,6 @@
 	#endif
 #endif
 
-namespace std17 = std;
-namespace std14 = std;
-namespace std11 = std;
-
 #include <etk/stdTools.h>
 
 #ifndef ETK_BUILD_LINEARMATH