diff --git a/Domains/Chemistry/vtkBlueObeliskData.cxx b/Domains/Chemistry/vtkBlueObeliskData.cxx
index 30ad41948d3205e8e9fd0509cec9790a324c0024..8de25fcd1bb2ecd9a4117f203e3d6745d9881b2e 100644
--- a/Domains/Chemistry/vtkBlueObeliskData.cxx
+++ b/Domains/Chemistry/vtkBlueObeliskData.cxx
@@ -228,10 +228,10 @@ void vtkBlueObeliskData::Initialize()
     return;
   }
 
-  this->NumberOfElements = _vtkBlueObeliskData::numberOfElements;
+  this->NumberOfElements = vtkBlueObeliskData_::numberOfElements;
   vtkIdType arraySize = this->NumberOfElements + 1; // 0 is dummy element
 
-#define READARRAY(name) LoadStringArray(this->name.Get(), _vtkBlueObeliskData::name, arraySize)
+#define READARRAY(name) LoadStringArray(this->name.Get(), vtkBlueObeliskData_::name, arraySize)
 
   READARRAY(Symbols);
   READARRAY(LowerSymbols);
@@ -243,7 +243,7 @@ void vtkBlueObeliskData::Initialize()
 
 #undef READARRAY
 #define READARRAY(numComps, name)                                                                  \
-  LoadDataArray<numComps>(this->name.Get(), _vtkBlueObeliskData::name, arraySize)
+  LoadDataArray<numComps>(this->name.Get(), vtkBlueObeliskData_::name, arraySize)
 
   READARRAY(1, Masses);
   READARRAY(1, ExactMasses);
@@ -352,7 +352,7 @@ bool vtkBlueObeliskData::GenerateHeaderFromXML(std::istream& xml, std::ostream&
   out << "// Autogenerated by vtkBlueObeliskData::GenerateHeaderFromXML.\n"
          "// Do not edit. Any modifications may be lost.\n"
          "\n"
-         "namespace _vtkBlueObeliskData {\n"
+         "namespace vtkBlueObeliskData_ {\n"
          "\n"
          "static const unsigned int numberOfElements = "
       << data->GetNumberOfElements() << ";\n\n";
@@ -382,7 +382,7 @@ bool vtkBlueObeliskData::GenerateHeaderFromXML(std::istream& xml, std::ostream&
 
 #undef DUMPARRAY
 
-  out << "} // end namespace _vtkBlueObeliskData\n";
+  out << "} // end namespace vtkBlueObeliskData_\n";
 
   return true;
 }
diff --git a/Domains/Chemistry/vtkBlueObeliskDataInternal.h b/Domains/Chemistry/vtkBlueObeliskDataInternal.h
index c6cb7977704d5baab9d0f7114c4e42125060640f..ba9b9edf2edfb60b69f589e00bfa9bccedd1938a 100644
--- a/Domains/Chemistry/vtkBlueObeliskDataInternal.h
+++ b/Domains/Chemistry/vtkBlueObeliskDataInternal.h
@@ -2,7 +2,7 @@
 // Autogenerated by vtkBlueObeliskData::GenerateHeaderFromXML.
 // Do not edit. Any modifications may be lost.
 
-namespace _vtkBlueObeliskData {
+namespace vtkBlueObeliskData_ {
 
 static const unsigned int numberOfElements = 118;
 
@@ -2324,5 +2324,5 @@ static const unsigned short Groups[119][1] = {
   { 18 }
 };
 
-} // end namespace _vtkBlueObeliskData
+} // end namespace vtkBlueObeliskData_
 // VTK-HeaderTest-Exclude: vtkBlueObeliskDataInternal.h