diff --git a/examples/advanced/Region/runExampleRegionSink.cxx b/examples/advanced/Region/runExampleRegionSink.cxx
index 10a72e0f..8bef7018 100644
--- a/examples/advanced/Region/runExampleRegionSink.cxx
+++ b/examples/advanced/Region/runExampleRegionSink.cxx
@@ -11,7 +11,7 @@
 
 namespace bpo = boost::program_options;
 
-void addCustomOptions(bpo::options_description& options)
+void addCustomOptions(bpo::options_description& /*options*/)
 {
 }