diff --git a/firmware/src/main.c b/firmware/src/main.c
index ca04bac..1290081 100644
--- a/firmware/src/main.c
+++ b/firmware/src/main.c
@@ -167,6 +167,16 @@ void wdt_init() {
   		 WDT_PERIOD_NONE);	/* Early Warning Period	*/
 }
 
+/**
+ * Power Management
+ */
+void powermananger_init(void)
+{
+  system_apb_clock_clear_mask(SYSTEM_CLOCK_APB_APBA,
+			      PM_APBAMASK_EIC | /* EIC is unused */
+			      PM_APBAMASK_RTC); /* RTC is unused */
+}
+
 int main(void)
 {
   /**
@@ -192,6 +202,9 @@ int main(void)
   system_set_sleepmode(SYSTEM_SLEEPMODE_STANDBY);
   system_set_sleepmode(SYSTEM_SLEEPMODE_IDLE_1); /* Disable CPU, AHB. APB still runs */
 
+  /* Configure the Power Manager */
+  powermananger_init();
+
   /* Configure the SysTick for 50Hz triggering */
   SysTick_Config(SystemCoreClock / 50);