diff --git a/src/osgPlugins/3ds/ReaderWriter3DS.cpp b/src/osgPlugins/3ds/ReaderWriter3DS.cpp
index 3f1660d03..364fb9e55 100644
--- a/src/osgPlugins/3ds/ReaderWriter3DS.cpp
+++ b/src/osgPlugins/3ds/ReaderWriter3DS.cpp
@@ -1197,7 +1197,7 @@ osgDB::ReaderWriter::WriteResult ReaderWriter3DS::doWriteNode(const osg::Node& n
 
 bool ReaderWriter3DS::createFileObject(const osg::Node& node, Lib3dsFile * file3ds,const std::string& fileName, const osgDB::ReaderWriter::Options* options) const
 {
-    WriterNodeVisitor w(file3ds, fileName, options, osgDB::getFilePath(node.getName()));
+    plugin3ds::WriterNodeVisitor w(file3ds, fileName, options, osgDB::getFilePath(node.getName()));
     const_cast<osg::Node &>(node).accept(w);                // Ugly const_cast<> for visitor...
     if (!w.succeeded()) return false;
     w.writeMaterials();
diff --git a/src/osgPlugins/3ds/WriterNodeVisitor.cpp b/src/osgPlugins/3ds/WriterNodeVisitor.cpp
index 44a5f5178..280b2f1a8 100644
--- a/src/osgPlugins/3ds/WriterNodeVisitor.cpp
+++ b/src/osgPlugins/3ds/WriterNodeVisitor.cpp
@@ -119,6 +119,11 @@ bool is3DSpath(const std::string & s, bool extendedFilePaths)
 }
 
 
+// Use namespace qualification to avoid static-link symbol collitions
+// from multiply defined symbols.
+namespace plugin3ds
+{
+
 
 /** writes all primitives of a primitive-set out to a stream, decomposes quads to triangles, line-strips to lines etc */
 class PrimitiveIndexWriter : public osg::PrimitiveIndexFunctor
@@ -355,8 +360,6 @@ void PrimitiveIndexWriter::drawArrays(GLenum mode,GLint first,GLsizei count)
     }
 }
 
-
-
 WriterNodeVisitor::Material::Material(WriterNodeVisitor & writerNodeVisitor, osg::StateSet * stateset, osg::Material* mat, osg::Texture* tex, int index) :
     index(index),
     diffuse(1,1,1,1),
@@ -1045,3 +1048,6 @@ void WriterNodeVisitor::apply3DSMatrixNode(osg::Node &node, const osg::Matrix &
     lib3ds_file_append_node(file3ds, reinterpret_cast<Lib3dsNode*>(node3ds), reinterpret_cast<Lib3dsNode*>(parent));
     _cur3dsNode = node3ds;
 }
+
+// end namespace plugin3ds
+}
diff --git a/src/osgPlugins/3ds/WriterNodeVisitor.h b/src/osgPlugins/3ds/WriterNodeVisitor.h
index d55377cf0..8fe3552c5 100644
--- a/src/osgPlugins/3ds/WriterNodeVisitor.h
+++ b/src/osgPlugins/3ds/WriterNodeVisitor.h
@@ -48,6 +48,9 @@ void copyOsgMatrixToLib3dsMatrix(Lib3dsMatrix lib3ds_matrix, const osg::Matrix&
 typedef std::map<std::pair<unsigned int, unsigned int>, unsigned int> MapIndices;
 typedef std::vector<std::pair<Triangle, int> > ListTriangle; //the int is the drawable of the triangle
 
+namespace plugin3ds
+{
+
 class WriterNodeVisitor: public osg::NodeVisitor
 {
     public:
@@ -213,4 +216,7 @@ class WriterNodeVisitor: public osg::NodeVisitor
         std::set<osg::Image *>              _imageSet;
 };
 
+// end namespace plugin3ds
+}
+
 #endif
diff --git a/src/osgPlugins/fbx/ReaderWriterFBX.cpp b/src/osgPlugins/fbx/ReaderWriterFBX.cpp
index 625953ac2..9dc1eb7fe 100644
--- a/src/osgPlugins/fbx/ReaderWriterFBX.cpp
+++ b/src/osgPlugins/fbx/ReaderWriterFBX.cpp
@@ -428,7 +428,7 @@ osgDB::ReaderWriter::WriteResult ReaderWriterFBX::writeNode(
         }
 
         KFbxScene* pScene = KFbxScene::Create(pSdkManager, "");
-        WriterNodeVisitor writerNodeVisitor(pScene, pSdkManager, filename,
+        pluginfbx::WriterNodeVisitor writerNodeVisitor(pScene, pSdkManager, filename,
             options, osgDB::getFilePath(node.getName().empty() ? filename : node.getName()));
         if (useFbxRoot && isBasicRootNode(node))
         {
diff --git a/src/osgPlugins/fbx/WriterNodeVisitor.cpp b/src/osgPlugins/fbx/WriterNodeVisitor.cpp
index d8e00564a..89ce764bd 100644
--- a/src/osgPlugins/fbx/WriterNodeVisitor.cpp
+++ b/src/osgPlugins/fbx/WriterNodeVisitor.cpp
@@ -25,6 +25,13 @@
 #include "WriterNodeVisitor.h"
 #include <limits.h>
 
+
+// Use namespace qualification to avoid static-link symbol collitions
+// from multiply defined symbols.
+namespace pluginfbx
+{
+
+
 /** writes all primitives of a primitive-set out to a stream, decomposes quads to triangles, line-strips to lines etc */
 class PrimitiveIndexWriter : public osg::PrimitiveIndexFunctor
 {
@@ -738,3 +745,6 @@ void WriterNodeVisitor::apply(osg::MatrixTransform& node)
     traverse(node);
     _curFbxNode = parent;
 }
+
+// end namespace pluginfbx
+}
diff --git a/src/osgPlugins/fbx/WriterNodeVisitor.h b/src/osgPlugins/fbx/WriterNodeVisitor.h
index 381c27ffb..2b6b3c3c2 100644
--- a/src/osgPlugins/fbx/WriterNodeVisitor.h
+++ b/src/osgPlugins/fbx/WriterNodeVisitor.h
@@ -41,6 +41,9 @@ struct Triangle
 typedef std::map<std::pair<unsigned int, unsigned int>, unsigned int> MapIndices;
 typedef std::vector<std::pair<Triangle, int> > ListTriangle; //the int is the drawable of the triangle
 
+namespace pluginfbx
+{
+
 ///\author Capo (Thibault Caporal)
 class WriterNodeVisitor: public osg::NodeVisitor
 {
@@ -253,4 +256,7 @@ class WriterNodeVisitor: public osg::NodeVisitor
         const std::string                   _srcDirectory;
 };
 
+// end namespace pluginfbx
+}
+
 #endif // _FBX_WRITER_NODE_VISITOR_HEADER__