diff --git a/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/InstrumentActor.cpp b/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/InstrumentActor.cpp
index c4ea2bd15ad2..79c16a180c73 100644
--- a/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/InstrumentActor.cpp
+++ b/Code/Mantid/MantidPlot/src/Mantid/InstrumentWidget/InstrumentActor.cpp
@@ -184,7 +184,6 @@ bool InstrumentActor::accept(GLActorVisitor& visitor, VisitorAcceptRule rule)
 {
   bool ok = m_scene.accept(visitor, rule);
   visitor.visit(this);
-  SetVisibilityVisitor* vv = dynamic_cast<SetVisibilityVisitor*>(&visitor);
   invalidateDisplayLists();
   return ok;
 }