diff --git a/cpdfcommand.ml b/cpdfcommand.ml
index 8c847e8..da8acc2 100644
--- a/cpdfcommand.ml
+++ b/cpdfcommand.ml
@@ -4576,7 +4576,7 @@ let go () =
              args.fast
                (prerotate (parse_pagespec underpdf "all") underpdf)
                (prerotate (parse_pagespec overpdf "all") overpdf)
-               false false true)
+               false false)
   | Some Encrypt ->
       let pdf = get_single_pdf args.op false in
         let pdf = Cpdfsqueeze.recompress_pdf pdf
diff --git a/cpdfpage.ml b/cpdfpage.ml
index 43d69e2..ff11f18 100644
--- a/cpdfpage.ml
+++ b/cpdfpage.ml
@@ -915,7 +915,8 @@ let equalize_pages under over =
     else
       under, over
 
-let combine_pages ~process_struct_tree fast under over scaletofit swap equalize =
+let combine_pages ~process_struct_tree fast under over scaletofit swap =
+  let over, under = if swap then under, over else over, under in
   let over = if process_struct_tree then mark_all_as_artifact (remove_struct_tree over) else over in
   let debug_combine_pages = false in
   let debug_pdf pdf n =
@@ -924,7 +925,7 @@ let combine_pages ~process_struct_tree fast under over scaletofit swap equalize
   in
   Pdfpage.add_prefix over (Pdfpage.shortest_unused_prefix under);
   let marks_under, marks_over = Pdfmarks.read_bookmarks under, Pdfmarks.read_bookmarks over in
-  let under, over = if equalize then equalize_pages under over else under, over in
+  let under, over = equalize_pages under over in
   let under_length, over_length = Pdfpage.endpage under, Pdfpage.endpage over in
     if under_length <> over_length then
       raise (Pdf.PDFError "combine_pages: not of equal length")
diff --git a/cpdfpage.mli b/cpdfpage.mli
index ac4a335..438893c 100644
--- a/cpdfpage.mli
+++ b/cpdfpage.mli
@@ -91,7 +91,7 @@ the same number of pages as the shorter file. If [scaletofit] is true, the
 [over] file will be scaled to fit. If [swap] is true, [over] and [under] are
 swapped.  If [fast] is true, the PDFs are assumed to be well-formed and no
 fixes are done. *)
-val combine_pages : process_struct_tree:bool -> bool -> Pdf.t -> Pdf.t -> bool -> bool -> bool -> Pdf.t
+val combine_pages : process_struct_tree:bool -> bool -> Pdf.t -> Pdf.t -> bool -> bool -> Pdf.t
 
 (** [stamp relative_to_cropbox position topline midline fast scale_to_fit isover range over pdf] stamps the first page of
 [over] over each page of the PDF. The arguments have the same meaning as in