diff --git a/rtgui/filmsimulation.cc b/rtgui/filmsimulation.cc
index 30ae09f9a..915e3a6d3 100644
--- a/rtgui/filmsimulation.cc
+++ b/rtgui/filmsimulation.cc
@@ -8,6 +8,8 @@
 
 #include "../rtengine/clutstore.h"
 #include "../rtengine/procparams.h"
+#define BENCHMARK
+#include "../rtengine/StopWatch.h"
 
 using namespace rtengine;
 using namespace rtengine::procparams;
@@ -305,6 +307,7 @@ ClutComboBox::ClutModel::ClutModel(const Glib::ustring &path)
 
 int ClutComboBox::ClutModel::parseDir(const Glib::ustring& path)
 {
+    BENCHFUNMICRO
     if (path.empty() || !Glib::file_test(path, Glib::FILE_TEST_IS_DIR)) {
         return 0;
     }
@@ -364,7 +367,7 @@ int ClutComboBox::ClutModel::parseDir(const Glib::ustring& path)
     }
 
     // Fill menu structure with CLUT files
-    std::set<Glib::ustring> entries;
+    std::set<std::string> entries;
 
     unsigned long fileCount = 0;