diff --git a/examples/osgvertexattributes/osgvertexattributes.cpp b/examples/osgvertexattributes/osgvertexattributes.cpp
index 4494dc9c3..deec04f9b 100644
--- a/examples/osgvertexattributes/osgvertexattributes.cpp
+++ b/examples/osgvertexattributes/osgvertexattributes.cpp
@@ -105,7 +105,7 @@ class ConvertToVertexAttibArrays : public osg::NodeVisitor
             shader.setShaderSource(source);
         }
 
-        void convertFragmentShader(osg::Program& program, osg::Shader& shader)
+        void convertFragmentShader(osg::Program& /*program*/, osg::Shader& /*shader*/)
         {
         }