diff --git a/src/osgPlugins/osg/Program.cpp b/src/osgPlugins/osg/Program.cpp
index acb70df8f..5f1b90a62 100644
--- a/src/osgPlugins/osg/Program.cpp
+++ b/src/osgPlugins/osg/Program.cpp
@@ -9,6 +9,9 @@ using namespace osg;
 using namespace osgDB;
 using namespace std;
 
+extern bool Geometry_matchPrimitiveModeStr(const char* str, GLenum& mode);
+extern const char* Geometry_getPrimitiveModeStr(GLenum mode);
+
 // forward declare functions to use later.
 bool Program_readLocalData(Object& obj, Input& fr);
 bool Program_writeLocalData(const Object& obj, Output& fw);
@@ -29,6 +32,35 @@ bool Program_readLocalData(Object& obj, Input& fr)
     bool iteratorAdvanced = false;
 
     Program& program = static_cast<Program&>(obj);
+    
+    if(fr.matchSequence("GeometryVerticesOut %i")) 
+    {
+        unsigned int verticesOut;
+        fr[1].getUInt(verticesOut);
+        program.setParameter(GL_GEOMETRY_VERTICES_OUT_EXT, verticesOut);
+        fr += 2;
+        iteratorAdvanced = true;
+    }
+    
+    if(fr.matchSequence("GeometryInputType %w")) 
+    {
+        std::string primitiveMode = fr[1].getStr();
+        GLenum mode;
+        if(Geometry_matchPrimitiveModeStr(primitiveMode.c_str(), mode))
+            program.setParameter(GL_GEOMETRY_INPUT_TYPE_EXT, mode);
+        fr += 2;
+        iteratorAdvanced = true;
+    }
+    
+    if(fr.matchSequence("GeometryOutputType %w")) 
+    {
+        std::string primitiveMode = fr[1].getStr();
+        GLenum mode;
+        if(Geometry_matchPrimitiveModeStr(primitiveMode.c_str(), mode))
+            program.setParameter(GL_GEOMETRY_OUTPUT_TYPE_EXT, mode);
+        fr += 2;
+        iteratorAdvanced = true;
+    }
 
     while(fr.matchSequence("AttribBindingLocation %i %w"))
     {
@@ -72,6 +104,10 @@ bool Program_readLocalData(Object& obj, Input& fr)
 bool Program_writeLocalData(const Object& obj,Output& fw)
 {
     const Program& program = static_cast<const Program&>(obj);
+    
+    fw.indent() << "GeometryVerticesOut " << program.getParameter(GL_GEOMETRY_VERTICES_OUT_EXT) << std::endl;
+    fw.indent() << "GeometryInputType " << Geometry_getPrimitiveModeStr(program.getParameter(GL_GEOMETRY_INPUT_TYPE_EXT)) << std::endl;
+    fw.indent() << "GeometryOutputType " << Geometry_getPrimitiveModeStr(program.getParameter(GL_GEOMETRY_OUTPUT_TYPE_EXT)) << std::endl;
 
     const Program::AttribBindingList& abl = program.getAttribBindingList();
     Program::AttribBindingList::const_iterator i;