diff --git a/NPSimulation/CMakeLists.txt b/NPSimulation/CMakeLists.txt
index ec76a6cbcad7d5b648b8d6c8f95d9aaf3c63362d..38fb9a2a492d5db6fda04714f1f0b36962c380e5 100644
--- a/NPSimulation/CMakeLists.txt
+++ b/NPSimulation/CMakeLists.txt
@@ -55,7 +55,7 @@ if(rdet)
 endif()
 
 # Add root to the link and include directories
-set(CMAKE_CXX_STANDARD 14)
+#set(CMAKE_CXX_STANDARD 17)
 
 if(Geant4_gdml_FOUND)  
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNPS_GDML")     
diff --git a/NPSimulation/Core/MaterialManager.cc b/NPSimulation/Core/MaterialManager.cc
index 2a52bf28d3ad03465ab6a13c64e67b2faf53e88b..07ae1a438355f11bd773fe7ab1921ded8b171d6c 100644
--- a/NPSimulation/Core/MaterialManager.cc
+++ b/NPSimulation/Core/MaterialManager.cc
@@ -220,6 +220,7 @@ G4Material* MaterialManager::GetMaterialFromLibrary(string Name, double density)
       m_Material[Name] = material;
       return material;
     }
+    // Metalic natural Lithium
     else if (Name == "Li") {
       if (!density)
         density = 0.534 * g / cm3;
@@ -228,6 +229,8 @@ G4Material* MaterialManager::GetMaterialFromLibrary(string Name, double density)
       m_Material[Name] = material;
       return material;
     }
+
+    // Metalic enriched Lithium
     else if (Name == "6Li") {
       if (!density)
         density = 0.534 * g / cm3;
@@ -236,6 +239,8 @@ G4Material* MaterialManager::GetMaterialFromLibrary(string Name, double density)
       m_Material[Name] = material;
       return material;
     }
+
+    // Metalic enriched Lithium
     else if (Name == "7Li") {
       if (!density)
         density = 0.534 * g / cm3;