diff --git a/cpdfcommand.ml b/cpdfcommand.ml
index a788bef..a2b3cc4 100644
--- a/cpdfcommand.ml
+++ b/cpdfcommand.ml
@@ -503,7 +503,8 @@ type args =
    mutable toc_title : string;
    mutable toc_bookmark : bool;
    mutable idir_only_pdfs : bool;
-   mutable no_warn_rotate : bool}
+   mutable no_warn_rotate : bool;
+   mutable xobj_bbox : float * float * float * float}
 
 let args =
   {op = None;
@@ -624,7 +625,8 @@ let args =
    toc_title = "Table of Contents";
    toc_bookmark = true;
    idir_only_pdfs = false;
-   no_warn_rotate = false}
+   no_warn_rotate = false;
+   xobj_bbox = (0., 0., 1000., 1000.)}
 
 let reset_arguments () =
   args.op <- None;
@@ -728,7 +730,8 @@ let reset_arguments () =
   args.dict_entry_search <- None;
   args.toc_title <- "Table of Contents";
   args.toc_bookmark <- true;
-  args.idir_only_pdfs <- false
+  args.idir_only_pdfs <- false;
+  args.xobj_bbox <- (0., 0., 1000., 1000.)
   (* Do not reset original_filename or cpdflin or was_encrypted or
    was_decrypted_with_owner or recrypt or producer or creator or path_to_* or
    gs_malformed or gs_quiet or no-warn-rotate, since we want these to work
@@ -1786,6 +1789,9 @@ let startxobj n =
   we_are_saving := Some n;
   Hashtbl.add saved_ops n []
 
+let xobjbbox s =
+  args.xobj_bbox <- Cpdfcoord.parse_rectangle (Pdf.empty ()) s 
+
 let addop o =
   match !we_are_saving with
   | Some n ->
@@ -1797,7 +1803,8 @@ let endxobj () =
   match !we_are_saving with
   | Some n ->
       we_are_saving := None;
-      addop (Cpdfdraw.FormXObject (n, rev (Hashtbl.find saved_ops n)))
+      let a, b, c, d = args.xobj_bbox in
+        addop (Cpdfdraw.FormXObject (a, b, c, d, n, rev (Hashtbl.find saved_ops n)))
   | None ->
       error "misplaced -endxobj"
 
@@ -2945,7 +2952,8 @@ and specs =
    ("-mscale", Arg.String setmscale, " Scale the graphics matrix");
    ("-mshearx", Arg.String setmshearx, " Shear the graphics matrix in X");
    ("-msheary", Arg.String setmshearx, " Shear the graphics matrix in Y");
-   ("-xobj", Arg.String startxobj, " Beign saving a sequence of graphics operators");
+   ("-xobj-bbox", Arg.String xobjbbox, " Specify the bounding box for xobjects");
+   ("-xobj", Arg.String startxobj, " Begin saving a sequence of graphics operators");
    ("-endxobj", Arg.Unit endxobj, " End saving a sequence of graphics operators");
    ("-use", Arg.String usexobj, " Use a saved sequence of graphics operators");
    ("-draw-jpeg", Arg.String addjpeg, " Load a JPEG from file and name it");
diff --git a/cpdfdraw.ml b/cpdfdraw.ml
index 5b3116a..8a0d082 100644
--- a/cpdfdraw.ml
+++ b/cpdfdraw.ml
@@ -32,7 +32,7 @@ type drawops =
   | FillStrokeEvenOdd
   | Clip
   | ClipEvenOdd
-  | FormXObject of string * drawops list
+  | FormXObject of float * float * float * float * string * drawops list
   | Use of string
   | ImageXObject of string * Pdf.pdfobject
   | Image of string
@@ -61,7 +61,6 @@ let current_url = ref None
 let fonts = null_hash ()
 let form_xobjects = null_hash ()
 
-
 let current_font =
   ref (Pdftext.StandardFont (Pdftext.TimesRoman, Pdftext.WinAnsiEncoding))
 
@@ -129,7 +128,7 @@ let rec ops_of_drawop pdf endpage filename bates batespad num page = function
   | SetLineJoin j -> [Pdfops.Op_j j]
   | SetMiterLimit m -> [Pdfops.Op_M m]
   | SetDashPattern (x, y) -> [Pdfops.Op_d (x, y)]
-  | FormXObject (n, ops) -> create_form_xobject pdf endpage filename bates batespad num page n ops; []
+  | FormXObject (a, b, c, d, n, ops) -> create_form_xobject a b c d pdf endpage filename bates batespad num page n ops; []
   | Use n -> [Pdfops.Op_Do n]
   | Image s -> [Pdfops.Op_Do (try fst (Hashtbl.find images s) with _ -> Cpdferror.error ("Image not found: " ^ s))]
   | ImageXObject (s, obj) ->
@@ -177,7 +176,7 @@ let rec ops_of_drawop pdf endpage filename bates batespad num page = function
 and ops_of_drawops pdf endpage filename bates batespad num page drawops =
   flatten (map (ops_of_drawop pdf endpage filename bates batespad num page) drawops)
 
-and create_form_xobject pdf endpage filename bates batespad num page n ops =
+and create_form_xobject a b c d pdf endpage filename bates batespad num page n ops =
   let data =
     Pdfio.bytes_of_string (Pdfops.string_of_ops (ops_of_drawops pdf endpage filename bates batespad num page ops))
   in
@@ -187,7 +186,7 @@ and create_form_xobject pdf endpage filename bates batespad num page n ops =
           (Pdf.Dictionary
              [("/Length", Pdf.Integer (Pdfio.bytes_size data));
               ("/Subtype", Pdf.Name "/Form");
-              ("/BBox", Pdf.Array [Pdf.Integer 0; Pdf.Integer 0; Pdf.Integer 1000; Pdf.Integer 1000]) (* FIXME*)
+              ("/BBox", Pdf.Array [Pdf.Real a; Pdf.Real b; Pdf.Real c; Pdf.Real d])
              ],
            Pdf.Got data)}
   in
diff --git a/cpdfdraw.mli b/cpdfdraw.mli
index 058083a..80e868e 100644
--- a/cpdfdraw.mli
+++ b/cpdfdraw.mli
@@ -30,7 +30,7 @@ type drawops =
   | FillStrokeEvenOdd
   | Clip
   | ClipEvenOdd
-  | FormXObject of string * drawops list
+  | FormXObject of float * float * float * float * string * drawops list
   | Use of string
   | ImageXObject of string * Pdf.pdfobject
   | Image of string