X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fcomponents%2Fgrafite_engine%2FgrafiteTypes.mli;h=92d4cc2aa446798f06303e9b8732776e3abe8622;hb=fc59fdd74aefc06a7d11bab7ebaafda478c18f7e;hp=4e226f7033af211e89497a26655163d1640ed087;hpb=75f910c7001ba5a6abe61fc93a2731753c7ba188;p=helm.git

diff --git a/matita/components/grafite_engine/grafiteTypes.mli b/matita/components/grafite_engine/grafiteTypes.mli
index 4e226f703..92d4cc2aa 100644
--- a/matita/components/grafite_engine/grafiteTypes.mli
+++ b/matita/components/grafite_engine/grafiteTypes.mli
@@ -31,7 +31,7 @@ exception Command_error of string
 
 val command_error: string -> 'a   (** @raise Command_error *)
 
-class status :
+class virtual status :
  string ->
   object ('self)
    (* Warning: #stack and #obj are meaningful iff #ng_mode is `ProofMode *)