diff --git a/dlls/oledlg/pastespl.c b/dlls/oledlg/pastespl.c
index 0835fa32349..a3d399cc79c 100644
--- a/dlls/oledlg/pastespl.c
+++ b/dlls/oledlg/pastespl.c
@@ -83,7 +83,7 @@ static void dump_ps_flags(DWORD flags)
     TRACE("flags %08x %s\n", flags, flagstr);
 }
 
-static void dump_pastespecial(LPOLEUIPASTESPECIALW ps)
+static void dump_pastespecial(const OLEUIPASTESPECIALW *ps)
 {
     UINT i;
     dump_ps_flags(ps->dwFlags);
@@ -363,7 +363,7 @@ static void init_lists(HWND hdlg, ps_struct_t *ps_struct)
         EnableWindow(GetDlgItem(hdlg, IDOK), 0);
 }
 
-static void update_src_text(HWND hdlg, ps_struct_t *ps_struct)
+static void update_src_text(HWND hdlg, const ps_struct_t *ps_struct)
 {
     WCHAR *str;
 
@@ -403,7 +403,7 @@ static void update_as_icon(HWND hdlg, ps_struct_t *ps_struct)
     EnableWindow(change_icon, 0);
 }
 
-static void update_result_text(HWND hdlg, ps_struct_t *ps_struct)
+static void update_result_text(HWND hdlg, const ps_struct_t *ps_struct)
 {
     WCHAR resource_txt[200];
     UINT res_id;