diff --git a/include/libopencm3/lpc43xx/ritimer.h b/include/libopencm3/lpc43xx/ritimer.h
new file mode 100644
index 00000000..d231a41c
--- /dev/null
+++ b/include/libopencm3/lpc43xx/ritimer.h
@@ -0,0 +1,40 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 Michael Ossmann <mike@ossmann.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LPC43XX_RITIMER_H
+#define LPC43XX_RITIMER_H
+
+#include <libopencm3/cm3/common.h>
+#include <libopencm3/lpc43xx/memorymap.h>
+
+/* --- Repetitive Interrupt Timer registers -------------------------------- */
+
+/* Compare register */
+#define RITIMER_COMPVAL                 MMIO32(RITIMER_BASE + 0x000)
+
+/* Mask register */
+#define RITIMER_MASK                    MMIO32(RITIMER_BASE + 0x004)
+
+/* Control register */
+#define RITIMER_CTRL                    MMIO32(RITIMER_BASE + 0x008)
+
+/* 32-bit counter */
+#define RITIMER_COUNTER                 MMIO32(RITIMER_BASE + 0x00C)
+
+#endif