diff --git a/externals/olafmatt/netsend~/netreceive~.c b/externals/olafmatt/netsend~/netreceive~.c
index 5998872872f677f188730d7a2a83822e7dc8f199..cbab984a95b8e93bac99287967cdfe017202ec69 100644
--- a/externals/olafmatt/netsend~/netreceive~.c
+++ b/externals/olafmatt/netsend~/netreceive~.c
@@ -1271,7 +1271,7 @@ void netreceive_tilde_setup(void)
 
 	class_addmethod(netreceive_tilde_class, nullfn, gensym("signal"), 0);
 	class_addbang(netreceive_tilde_class, (t_method)netreceive_tilde_bang);
-	class_addmethod(netreceive_tilde_class, (t_method)netreceive_tilde_dsp, gensym("dsp"), 0);
+	class_addmethod(netreceive_tilde_class, (t_method)netreceive_tilde_dsp, gensym("dsp"), A_CANT, 0);
 	class_addmethod(netreceive_tilde_class, (t_method)netreceive_tilde_print, gensym("print"), 0);
 	class_addmethod(netreceive_tilde_class, (t_method)netreceive_tilde_kick, gensym("kick"), 0);
 	class_addmethod(netreceive_tilde_class, (t_method)netreceive_tilde_reset, gensym("reset"), A_DEFFLOAT, 0);
diff --git a/externals/olafmatt/netsend~/netsend~.c b/externals/olafmatt/netsend~/netsend~.c
index 5d79018ee2a43d968c4f06adaa123fc2b4e06273..5ead14b9673a67f337b27dac91a2b2c8bb4478c4 100644
--- a/externals/olafmatt/netsend~/netsend~.c
+++ b/externals/olafmatt/netsend~/netsend~.c
@@ -958,7 +958,7 @@ void netsend_tilde_setup(void)
     netsend_tilde_class = class_new(gensym("netsend~"), (t_newmethod)netsend_tilde_new, (t_method)netsend_tilde_free,
         sizeof(t_netsend_tilde), 0, A_DEFFLOAT, A_DEFFLOAT, A_NULL);
     class_addmethod(netsend_tilde_class, nullfn, gensym("signal"), 0);
-    class_addmethod(netsend_tilde_class, (t_method)netsend_tilde_dsp, gensym("dsp"), 0);
+    class_addmethod(netsend_tilde_class, (t_method)netsend_tilde_dsp, gensym("dsp"), A_CANT, 0);
     class_addfloat(netsend_tilde_class, netsend_tilde_float);
     class_addbang(netsend_tilde_class, netsend_tilde_bang);
     class_addmethod(netsend_tilde_class, (t_method)netsend_tilde_connect, gensym("connect"), A_DEFSYM, A_DEFFLOAT, 0);