diff --git a/types/objectId/SelectionObjectMarker.cc b/types/objectId/SelectionObjectMarker.cc
index b0c31d6f4ddb025f8a0a77bdb75efe2616bcdfa6..b0bac43bac5b56902d07c13863bd2c5f39ab541a 100644
--- a/types/objectId/SelectionObjectMarker.cc
+++ b/types/objectId/SelectionObjectMarker.cc
@@ -43,11 +43,13 @@
 
 #include <OpenFlipper/common/Types.hh>
 #include "SelectionObjectMarker.hh"
+ 
+namespace VSI {
 
 //******************************************************************************
 
-const ACG::Vec4f disabled_color (0.4f,0.4f,0.4f,1.0f);
-const ACG::Vec4f selected_color (0.0f,1.0f,0.0f,0.5f);
+static const ACG::Vec4f disabled_color (0.4f,0.4f,0.4f,1.0f);
+static const ACG::Vec4f selected_color (0.0f,1.0f,0.0f,0.5f);
 
 //******************************************************************************
 
@@ -87,3 +89,4 @@ bool SelectionObjectMarker::blendForStencilRefNumber(GLuint _reference, GLenum &
   return false;
 }
 
+} // namespace VSI
diff --git a/types/objectId/SelectionObjectMarker.hh b/types/objectId/SelectionObjectMarker.hh
index b0ec94063ebd10a2b1c0a2a4b1cceb7d8e1f75f0..ea76406e2222ceac251851d5412e366de449e9f3 100644
--- a/types/objectId/SelectionObjectMarker.hh
+++ b/types/objectId/SelectionObjectMarker.hh
@@ -48,6 +48,7 @@
 #include <OpenFlipper/common/Types.hh>
 #include <OpenFlipper/common/ViewObjectMarker.hh>
 
+namespace VSI {
 /** Object marker to visualize objectPickDialog selection
 */
 class SelectionObjectMarker : public ViewObjectMarker
@@ -59,4 +60,6 @@ class SelectionObjectMarker : public ViewObjectMarker
     bool blendForStencilRefNumber (GLuint _reference, GLenum &_src, GLenum &_dst, ACG::Vec4f &_color);
 };
 
+} // namespce VSI
+
 #endif
diff --git a/types/objectId/TreeModel.cc b/types/objectId/TreeModel.cc
index 869bb97bbc946b9ecde1d815ee41b649d784073c..2d46246ac10a2f5abede1283357683928ba610ee 100644
--- a/types/objectId/TreeModel.cc
+++ b/types/objectId/TreeModel.cc
@@ -51,6 +51,7 @@
 
 #include <QtWidgets>
 
+namespace VSI {
 
 //******************************************************************************
 
@@ -594,3 +595,6 @@ bool TreeModel::setData(const QModelIndex &_index, const QVariant &_value, int /
 bool TreeModel::isRoot(TreeItem * _item) {
   return ( _item == rootItem_ ); 
 }
+
+
+} // namespace VSI
diff --git a/types/objectId/TreeModel.hh b/types/objectId/TreeModel.hh
index b531c764cee6f350f6b24d14adb570252dbae1e5..31de56a2db26bb3375873aeb2e0fd4110801c75f 100644
--- a/types/objectId/TreeModel.hh
+++ b/types/objectId/TreeModel.hh
@@ -50,6 +50,8 @@
 
 #include "TreeItem.hh"
 
+namespace VSI {
+
 class TreeModel : public QAbstractItemModel
 {
   Q_OBJECT
@@ -169,5 +171,7 @@ private:
 
 };
 
+} // namespace VSI
+
 #endif
 
diff --git a/types/objectId/objectIdWidget.hh b/types/objectId/objectIdWidget.hh
index 69927c9e15a1aac7a5fad466d6b334b5525818bf..0b6024ad420c4a321a6e6887eddb859980154fb5 100644
--- a/types/objectId/objectIdWidget.hh
+++ b/types/objectId/objectIdWidget.hh
@@ -50,11 +50,12 @@
 //== FORWARDDECLARATIONS ======================================================
 class QComboBox;
 class QPushButton;
-class TreeModel;
 
 //== NAMESPACES ===============================================================
 namespace VSI {
 
+class TreeModel;
+
 //== CLASS DEFINITION =========================================================
 
 /** Widget to configure object id inputs
diff --git a/types/objectId/objectPickDialog.hh b/types/objectId/objectPickDialog.hh
index 8cba2644a1e55ca1e63711d33caad2a5abfd8f8e..6410a6eba76b43ae717b4c9e47439fa80f8cc34c 100644
--- a/types/objectId/objectPickDialog.hh
+++ b/types/objectId/objectPickDialog.hh
@@ -55,13 +55,14 @@ class QPushButton;
 class QTreeView;
 class QMouseEvent;
 
-class TreeModel;
 
 class SimpleViewer;
 
 //== NAMESPACES ===============================================================
 namespace VSI {
 
+class TreeModel;
+
 //== CLASS DEFINITION =========================================================
 
 /** Widget to pick a object