diff --git a/plug-ins/common/busy-dialog.c b/plug-ins/common/busy-dialog.c
index 4a3d1cafb7..d7b1ad48a6 100644
--- a/plug-ins/common/busy-dialog.c
+++ b/plug-ins/common/busy-dialog.c
@@ -147,26 +147,29 @@ busy_dialog_create_procedure (GimpPlugIn  *plug_in,
                                        "The read file descriptor",
                                        "The read file descriptor",
                                        G_MININT, G_MAXINT, 0,
-                                       G_PARAM_READWRITE);
+                                       G_PARAM_READWRITE |
+                                       GIMP_PARAM_DONT_SERIALIZE);
 
       gimp_procedure_add_int_argument (procedure, "write-fd",
                                        "The write file descriptor",
                                        "The write file descriptor",
                                        G_MININT, G_MAXINT, 0,
-                                       G_PARAM_READWRITE);
-
+                                       G_PARAM_READWRITE |
+                                       GIMP_PARAM_DONT_SERIALIZE);
 
       gimp_procedure_add_string_argument (procedure, "message",
                                           "The message",
                                           "The message",
                                           NULL,
-                                          G_PARAM_READWRITE);
+                                          G_PARAM_READWRITE |
+                                          GIMP_PARAM_DONT_SERIALIZE);
 
       gimp_procedure_add_boolean_argument (procedure, "cancelable",
                                            "Whether the dialog is cancelable",
                                            "Whether the dialog is cancelable",
                                            FALSE,
-                                           G_PARAM_READWRITE);
+                                           G_PARAM_READWRITE |
+                                           GIMP_PARAM_DONT_SERIALIZE);
     }
 
   return procedure;