diff --git a/src/Mod/Mesh/App/Core/MeshIO.cpp b/src/Mod/Mesh/App/Core/MeshIO.cpp
index 1c49e1205c..5184bff722 100644
--- a/src/Mod/Mesh/App/Core/MeshIO.cpp
+++ b/src/Mod/Mesh/App/Core/MeshIO.cpp
@@ -341,11 +341,6 @@ bool MeshInput::LoadOBJ (std::istream &rstrIn)
     unsigned long countMaterialFacets = 0;
 
     while (std::getline(rstrIn, line)) {
-        // when a group name comes don't make it lower case
-        if (!line.empty() && line[0] != 'g') {
-            for (std::string::iterator it = line.begin(); it != line.end(); ++it)
-                *it = tolower(*it);
-        }
         if (boost::regex_match(line.c_str(), what, rx_p)) {
             fX = (float)std::atof(what[1].first);
             fY = (float)std::atof(what[4].first);
@@ -1285,8 +1280,7 @@ bool MeshInput::LoadMeshNode (std::istream &rstrIn)
         return false;
 
     while (std::getline(rstrIn, line)) {
-        for (std::string::iterator it = line.begin(); it != line.end(); ++it)
-            *it = tolower(*it);
+        boost::algorithm::to_lower(line);
         if (boost::regex_match(line.c_str(), what, rx_p)) {
             fX = (float)std::atof(what[1].first);
             fY = (float)std::atof(what[4].first);