--- a/src/mpv.cc
+++ b/src/mpv.cc
@@ -39,17 +39,17 @@
 
       octave_stdout << "installing mp type at type-id = "
            << octave_mp::static_type_id () << "\n";
-
-      INSTALL_NCUNOP (op_incr, octave_mp, s_incr);
-      INSTALL_NCUNOP (op_decr, octave_mp, s_decr);
-
+  
+      // INSTALL_NCUNOP (op_incr, octave_mp, s_incr);
+      // INSTALL_NCUNOP (op_decr, octave_mp, s_decr);
+      install_mp_ops();
+     
       type_loaded = true;
 
     }
 
   octave_value retval;
-
- 
+  
   if (args.length () == 2)
     {
       int prec = args(1).int_value ();