diff --git a/rtgui/partialpastedlg.cc b/rtgui/partialpastedlg.cc
index e42dc0b8e..c0cc2c87c 100644
--- a/rtgui/partialpastedlg.cc
+++ b/rtgui/partialpastedlg.cc
@@ -19,6 +19,7 @@
 #include "partialpastedlg.h"
 #include "multilangmgr.h"
 #include "paramsedited.h"
+#include "guiutils.h"
 
 PartialPasteDlg::PartialPasteDlg (const Glib::ustring &title, Gtk::Window* parent)
     : Gtk::Dialog (title, *parent, true)
@@ -256,9 +257,13 @@ PartialPasteDlg::PartialPasteDlg (const Glib::ustring &title, Gtk::Window* paren
 
     Gtk::HBox* hbmain = Gtk::manage (new Gtk::HBox ());
     hbmain->pack_start (*vbCol1);
-    hbmain->pack_start (*(Gtk::manage (new Gtk::VSeparator ())));
+    Gtk::VSeparator *vsep1 = Gtk::manage (new Gtk::VSeparator ());
+    setExpandAlignProperties(vsep1, false, true, Gtk::ALIGN_CENTER, Gtk::ALIGN_FILL);
+    hbmain->pack_start (*vsep1);
     hbmain->pack_start (*vbCol2);
-    hbmain->pack_start (*(Gtk::manage (new Gtk::VSeparator ())));
+    Gtk::VSeparator *vsep2 = Gtk::manage (new Gtk::VSeparator ());
+    setExpandAlignProperties(vsep2, false, true, Gtk::ALIGN_CENTER, Gtk::ALIGN_FILL);
+    hbmain->pack_start (*vsep2);
     hbmain->pack_start (*vbCol3);
 
     scrolledwindow = Gtk::manage ( new Gtk::ScrolledWindow() );