diff --git a/include/osg/GLU b/include/osg/GLU
index 5c731fb9d..9fc6b130a 100644
--- a/include/osg/GLU
+++ b/include/osg/GLU
@@ -3,7 +3,7 @@
 //as published by the Free Software Foundation.
 
 #ifndef OSG_GLU
-#define OSG_GL 1
+#define OSG_GLU 1
 
 #ifdef __APPLE_CC__
 	#include <OpenGL/glu.h>
@@ -11,4 +11,4 @@
 	#include <GL/glu.h>
 #endif
 
-#endif  // __osgGL_h
+#endif  // __osgGLU_h
diff --git a/include/osg/Matrix b/include/osg/Matrix
index e4d850813..facd122da 100644
--- a/include/osg/Matrix
+++ b/include/osg/Matrix
@@ -86,6 +86,7 @@ class SG_EXPORT Matrix : public Object
         bool invertAffine( const Matrix& );
 
         //basic utility functions to create new matrices or vectors
+	inline static Matrix identity( void );
         inline static Matrix scale( const Vec3& );
         inline static Matrix scale( float, float, float );
         inline static Matrix trans( const Vec3& );
@@ -180,6 +181,13 @@ class SG_EXPORT Matrix : public Object
 };
 
 //static utility methods
+inline Matrix Matrix::identity(void)
+{
+    Matrix m;
+    m.makeIdent();
+    return m;
+}
+
 inline Matrix Matrix::scale(float sx, float sy, float sz)
 {
     Matrix m;