diff --git a/Tools/MeshSkinning/main.cpp b/Tools/MeshSkinning/main.cpp
index f1607929..fe04ff57 100644
--- a/Tools/MeshSkinning/main.cpp
+++ b/Tools/MeshSkinning/main.cpp
@@ -111,11 +111,13 @@ unsigned int getNeighbor(const unsigned int pointSetIndex, const unsigned int in
 	return neighborhoodSearch->point_set(0).neighbor(pointSetIndex, index, k);
 }
 
+namespace std {
 std::ostream& operator << (std::ostream& out, const Vector3r& r)
 {
 	out << r[0] << ", " << r[1] << ", " << r[2];
 	return out;
 }
+}
 
 
 // main 
@@ -216,18 +218,18 @@ int main( int argc, char **argv )
 			}
 
 			if (result.count("scale"))
-				scale = Vector3r(result["scale"].as<std::vector<Real>>().data()); 
+				scale = Vector3r(result["scale"].as<std::vector<Real>>().data());
 			LOG_INFO << "Scale: " << scale;
 
 			if (result.count("translation"))
-				translation = Vector3r(result["translation"].as<std::vector<Real>>().data()); 
+				translation = Vector3r(result["translation"].as<std::vector<Real>>().data());
 			LOG_INFO << "Translation: " << translation;
 
 			Vector3r axis = Vector3r::Zero();
 			Real angle = 0.0;
 			rotation = Matrix3r::Identity();
 			if (result.count("axis"))
-				axis = Vector3r(result["axis"].as<std::vector<Real>>().data()); 
+				axis = Vector3r(result["axis"].as<std::vector<Real>>().data());
 			if (result.count("angle"))
 			{
 				angle = result["angle"].as<Real>();
diff --git a/Tools/VolumeSampling/main.cpp b/Tools/VolumeSampling/main.cpp
index 6125b963..f4e0b33b 100644
--- a/Tools/VolumeSampling/main.cpp
+++ b/Tools/VolumeSampling/main.cpp
@@ -62,6 +62,7 @@ bool useCache = true;
 std::shared_ptr<Discregrid::CubicLagrangeDiscreteGrid> distanceField;
 
 
+namespace std {
 std::ostream& operator << (std::ostream& out, const Eigen::Matrix<unsigned int, 3, 1>& r)
 {
 	out << r[0] << ", " << r[1] << ", " << r[2];
@@ -73,6 +74,7 @@ std::ostream& operator << (std::ostream& out, const Vector3r& r)
 	out << r[0] << ", " << r[1] << ", " << r[2];
 	return out;
 }
+}
 
 // main 
 int main(int argc, char **argv)
@@ -161,7 +163,7 @@ int main(int argc, char **argv)
 		LOG_INFO << "Radius: " << radius;
 
 		if (result.count("scale"))
-			scale = Vector3r(result["scale"].as<std::vector<Real>>().data()); 
+			scale = Vector3r(result["scale"].as<std::vector<Real>>().data());
 		LOG_INFO << "Scale: " << scale;
 
 		if (result.count("steps"))
@@ -209,7 +211,7 @@ int main(int argc, char **argv)
 			const std::vector<Real> &v = result["region"].as<std::vector<Real>>();
 			if (v.size() == 6)
 				region = SamplingBase::Region(v[0], v[1], v[2], v[3], v[4], v[5]);
-			else 
+			else
 				LOG_WARN << "Region parameter has wrong number of elements.";
 			useRegion = true;
 			LOG_INFO << "Region - min: " << region.m_min.transpose();