diff --git a/examples/slideshow3D/ReaderWriterXML.cpp b/examples/slideshow3D/ReaderWriterXML.cpp
index e233a94c3..a7e797a66 100644
--- a/examples/slideshow3D/ReaderWriterXML.cpp
+++ b/examples/slideshow3D/ReaderWriterXML.cpp
@@ -171,7 +171,7 @@ void ReaderWriterSS3D::parseSlide (SlideShowConstructor& constructor, xmlDocPtr
 }
 
 osgDB::ReaderWriter::ReadResult ReaderWriterSS3D::readNode(const std::string& fileName,
-                                                           const osgDB::ReaderWriter::Options* options)
+                                                           const osgDB::ReaderWriter::Options*)
 {
     std::string ext = osgDB::getLowerCaseFileExtension(fileName);
     if (!acceptsExtension(ext))