diff --git a/rtgui/thumbbrowserentry.cc b/rtgui/thumbbrowserentry.cc
index 988d588f8..7703e9775 100644
--- a/rtgui/thumbbrowserentry.cc
+++ b/rtgui/thumbbrowserentry.cc
@@ -27,11 +27,6 @@ FileBrowserEntry::FileBrowserEntry (Thumbnail* thm, const Glib::ustring& fname)
     exifline = thumbnail->getExifString ();
 }
 
-void ThumbBrowserEntry::obtainThumbnailImage () {
-
-    preview = thumbnail ? (guint8*) thumbnail->getThumbnailImage (prew, preh) : NULL;
-}
-
 void ThumbBrowserEntry::obtainThumbnailSize () {
 
     if (thumbnail)
diff --git a/rtgui/thumbbrowserentrybase.h b/rtgui/thumbbrowserentrybase.h
index 06552a774..4e8b94e79 100644
--- a/rtgui/thumbbrowserentrybase.h
+++ b/rtgui/thumbbrowserentrybase.h
@@ -40,7 +40,7 @@ protected:
     int sideMargin;
     int lowerMargin;
 
-    guint8* preview;
+    guint8* preview;  // holds the preview image. used in updateBackBuffer. TODO Olli: Make a cache to reduce mem significantly
 
     Glib::ustring dispname;