diff --git a/externals/mrpeach/net/udpreceive~.c b/externals/mrpeach/net/udpreceive~.c
index 2c18ba7d7305b64f95b3705927a3bbb92d1b61ed..115858fd10a0fa6786aa40366f1662c1257b638c 100644
--- a/externals/mrpeach/net/udpreceive~.c
+++ b/externals/mrpeach/net/udpreceive~.c
@@ -797,7 +797,7 @@ void udpreceive_tilde_setup(void)
 
     class_addmethod(udpreceive_tilde_class, nullfn, gensym("signal"), 0);
     class_addmethod(udpreceive_tilde_class, (t_method)udpreceive_tilde_info, gensym("info"), 0);
-    class_addmethod(udpreceive_tilde_class, (t_method)udpreceive_tilde_dsp, gensym("dsp"), 0);
+    class_addmethod(udpreceive_tilde_class, (t_method)udpreceive_tilde_dsp, gensym("dsp"), A_CANT, 0);
     class_addmethod(udpreceive_tilde_class, (t_method)udpreceive_tilde_reset, gensym("reset"), A_DEFFLOAT, 0);
     class_addmethod(udpreceive_tilde_class, (t_method)udpreceive_tilde_reset, gensym("buffer"), A_DEFFLOAT, 0);
     class_addmethod(udpreceive_tilde_class, (t_method)udpreceive_tilde_setsocket, gensym("port"), A_DEFFLOAT, 0);
diff --git a/externals/mrpeach/net/udpsend~.c b/externals/mrpeach/net/udpsend~.c
index 5846524ab693f94106e4147f66449b11809a308e..dd521db0a9b240debb3eb57ef38cd169f577135d 100644
--- a/externals/mrpeach/net/udpsend~.c
+++ b/externals/mrpeach/net/udpsend~.c
@@ -914,7 +914,7 @@ void udpsend_tilde_setup(void)
     udpsend_tilde_class = class_new(gensym("udpsend~"), (t_newmethod)udpsend_tilde_new, (t_method)udpsend_tilde_free,
         sizeof(t_udpsend_tilde), 0, A_DEFFLOAT, A_DEFFLOAT, A_NULL);
     class_addmethod(udpsend_tilde_class, nullfn, gensym("signal"), 0);
-    class_addmethod(udpsend_tilde_class, (t_method)udpsend_tilde_dsp, gensym("dsp"), 0);
+    class_addmethod(udpsend_tilde_class, (t_method)udpsend_tilde_dsp, gensym("dsp"), A_CANT, 0);
     class_addfloat(udpsend_tilde_class, udpsend_tilde_float);
     class_addmethod(udpsend_tilde_class, (t_method)udpsend_tilde_info, gensym("info"), 0);
     class_addmethod(udpsend_tilde_class, (t_method)udpsend_tilde_connect, gensym("connect"), A_DEFSYM, A_DEFFLOAT, 0);