diff --git a/src/graph_gui.h b/src/graph_gui.h
new file mode 100644
--- /dev/null
+++ b/src/graph_gui.h
@@ -0,0 +1,24 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file graph_gui.h Graph GUI functions. */
+
+#ifndef GRAPH_GUI_H
+#define GRAPH_GUI_H
+
+void ShowOperatingProfitGraph();
+void ShowIncomeGraph();
+void ShowDeliveredCargoGraph();
+void ShowPerformanceHistoryGraph();
+void ShowCompanyValueGraph();
+void ShowCargoPaymentRates();
+void ShowCompanyLeagueTable();
+void ShowPerformanceRatingDetail();
+
+#endif /* GRAPH_GUI_H */