Index: boost/statechart/simple_state.hpp
===================================================================
--- boost/statechart/simple_state.hpp	(revision 84007)
+++ boost/statechart/simple_state.hpp	(working copy)
@@ -527,7 +527,7 @@
           {
             pContext_->set_outermost_unstable_state(
               pOutermostUnstableState );
-            // fall through to next case intended
+            BOOST_FALLTHROUGH;
           }
           else
           {