diff --git a/cpu/nrf51/periph/pm.c b/cpu/nrf51/periph/pm.c
new file mode 100644
index 0000000000..1979c53e35
--- /dev/null
+++ b/cpu/nrf51/periph/pm.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2017 Kaspar Schleiser <kaspar@schleiser.de>
+ *               2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     cpu_nrf51
+ * @{
+ *
+ * @file
+ * @brief       Implementation of the kernels power management interface
+ *
+ * @author      Kaspar Schleiser <kaspar@schleiser.de>
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ *
+ * @}
+ */
+
+#include "periph/pm.h"
+#include "cpu.h"
+
+void pm_off(void)
+{
+    NRF_POWER->RAMON = 0;
+    NRF_POWER->SYSTEMOFF = 1;
+}