diff --git a/cpu/efm32/include/periph_cpu.h b/cpu/efm32/include/periph_cpu.h
index f131e67fe7..1fd63fd20c 100644
--- a/cpu/efm32/include/periph_cpu.h
+++ b/cpu/efm32/include/periph_cpu.h
@@ -371,10 +371,15 @@ typedef struct {
     IRQn_Type irq;          /**< the devices base IRQ channel */
 } uart_conf_t;
 
+/**
+ * @brief   CPU provides own pm_off() function
+ */
+#define PROVIDES_PM_LAYERED_OFF
+
 /**
  * @brief   Number of usable power modes.
  */
-#define PM_NUM_MODES    (3U)
+#define PM_NUM_MODES    (2U)
 
 #ifdef __cplusplus
 }
diff --git a/cpu/efm32/periph/pm.c b/cpu/efm32/periph/pm.c
index f88c3ffd97..4a9aaef707 100644
--- a/cpu/efm32/periph/pm.c
+++ b/cpu/efm32/periph/pm.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2017 Bas Stottelaar <basstottelaar@gmail.com>
+ * Copyright (C) 2017-2018 Bas Stottelaar <basstottelaar@gmail.com>
  *
  * 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
@@ -33,9 +33,13 @@ void pm_set(unsigned mode)
             /* after exiting EM2, clocks are restored */
             EMU_EnterEM2(true);
             break;
-        case 2:
+        default:
             /* wait for next event or interrupt */
             EMU_EnterEM1();
-            break;
     }
 }
+
+void pm_off(void)
+{
+    EMU_EnterEM4();
+}