diff --git a/gsmartcontrol/src/applib/app_gtkmm_utils.cpp b/gsmartcontrol/src/applib/app_gtkmm_utils.cpp
index 201f3b4..6b61852 100644
--- a/gsmartcontrol/src/applib/app_gtkmm_utils.cpp
+++ b/gsmartcontrol/src/applib/app_gtkmm_utils.cpp
@@ -63,24 +63,6 @@ void app_gtkmm_set_widget_tooltip(Gtk::Widget& widget,
 
 
 
-bool app_gtkmm_icon_theme_has_icon(Glib::RefPtr<Gtk::IconTheme> theme,
-		const Glib::ustring& icon_name, int size)
-{
-	if (!theme || !theme->has_icon(icon_name))  // check if it exists first, or exception may be thrown.
-		return false;
-
-	std::vector<int> sizes = theme->get_icon_sizes(icon_name);
-
-	for (std::vector<int>::const_iterator iter = sizes.begin(); iter != sizes.end(); ++iter) {
-		if (*iter == size || *iter == -1)  // -1 means scalable
-			return true;
-	}
-
-	return false;
-}
-
-
-
 namespace {
 
 	/// This has been copied from _g_utf8_make_valid() (glib-2.20.4).
diff --git a/gsmartcontrol/src/applib/app_gtkmm_utils.h b/gsmartcontrol/src/applib/app_gtkmm_utils.h
index 622b043..74de72f 100644
--- a/gsmartcontrol/src/applib/app_gtkmm_utils.h
+++ b/gsmartcontrol/src/applib/app_gtkmm_utils.h
@@ -68,11 +68,6 @@ int app_gtkmm_create_tree_view_column(Gtk::TreeModelColumn<T>& mcol, Gtk::TreeVi
 
 
 
-/// Check whether the icon theme has the specified icon of size \c size.
-bool app_gtkmm_icon_theme_has_icon(Glib::RefPtr<Gtk::IconTheme> theme,
-		const Glib::ustring& icon_name, int size);
-
-
 /// Get Glib::ustring from gchar*, freeing gchar*.
 Glib::ustring app_ustring_from_gchar(gchar* str);