1 files changed, 5 insertions, 0 deletions
diff --git a/src/options.hpp b/src/options.hpp
index cde144c..a52fdeb 100644
--- a/src/options.hpp
+++ b/src/options.hpp
@@ -48,6 +48,11 @@ namespace zmq
 
         //  Enable multicast loopback. Default disabled (false).
         bool use_multicast_loop;
+
+        //  These options are never set by the user directly. Instead they are
+        //  provided by the specific socket type.
+        bool requires_in;
+        bool requires_out;
     };
 
 }