diff --git a/include/boost/fusion/container/map/map_fwd.hpp b/include/boost/fusion/container/map/map_fwd.hpp
index 18e445b0..614ea249 100644
--- a/include/boost/fusion/container/map/map_fwd.hpp
+++ b/include/boost/fusion/container/map/map_fwd.hpp
@@ -36,8 +36,6 @@
 # include <boost/fusion/container/map/detail/cpp03/map_fwd.hpp>
 #else
 
-#include <boost/fusion/container/map/detail/map_impl.hpp>
-
 ///////////////////////////////////////////////////////////////////////////////
 // C++11 interface
 ///////////////////////////////////////////////////////////////////////////////