diff --git a/include/boost/mpl/if.hpp b/include/boost/mpl/if.hpp
index 144d944..d059ad6 100644
--- a/include/boost/mpl/if.hpp
+++ b/include/boost/mpl/if.hpp
@@ -100,6 +100,8 @@ struct if_
 
  public:
     typedef typename answer< BOOST_MPL_AUX_ICE_CAST(bool, c_) >::type type;
+
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(3,if_,(C,T1,T2))
 };
 
 #else