diff --git a/rtgui/exifpanel.cc b/rtgui/exifpanel.cc
index cd054e7ab..168106804 100644
--- a/rtgui/exifpanel.cc
+++ b/rtgui/exifpanel.cc
@@ -46,11 +46,7 @@ ExifPanel::ExifPanel () : idata (nullptr)
     exifTreeModel = Gtk::TreeStore::create (exifColumns);
     exifTree->set_model (exifTreeModel);
     exifTree->set_grid_lines (Gtk::TREE_VIEW_GRID_LINES_NONE);
-    exifTree->set_row_separator_func (
-    [&] (const Glib::RefPtr<Gtk::TreeModel>& model, const Gtk::TreeModel::iterator & row)-> bool {
-        return row->get_value (exifColumns.isSeparator);
-    }
-    );
+    exifTree->set_row_separator_func (sigc::mem_fun(*this, &ExifPanel::rowSeperatorFunc));
 
     delicon = RTImage::createFromFile ("gtk-close.png");
     keepicon = RTImage::createFromFile ("gtk-apply.png");
@@ -540,6 +536,11 @@ void ExifPanel::showAlltoggled ()
     setImageData (idata);
 }
 
+bool ExifPanel::rowSeperatorFunc(const Glib::RefPtr<Gtk::TreeModel>& model, const Gtk::TreeModel::iterator& iter)
+{
+    return iter->get_value(exifColumns.isSeparator);
+}
+
 void ExifPanel::editTag (Gtk::TreeModel::Children root, Glib::ustring name, Glib::ustring value)
 {
 
diff --git a/rtgui/exifpanel.h b/rtgui/exifpanel.h
index b9d76f25d..5121eff4f 100644
--- a/rtgui/exifpanel.h
+++ b/rtgui/exifpanel.h
@@ -93,6 +93,7 @@ private:
     void resetAllPressed();
     void addPressed();
     void showAlltoggled();
+    bool rowSeperatorFunc(const Glib::RefPtr<Gtk::TreeModel>& model, const Gtk::TreeModel::iterator& iter);
 
 public:
     ExifPanel ();