1 files changed, 3 insertions, 1 deletions
diff --git a/testhal/STM32F1xx/RTC/main.c b/testhal/STM32F1xx/RTC/main.c
index 2b3bb7be8..5797f4235 100644
--- a/testhal/STM32F1xx/RTC/main.c
+++ b/testhal/STM32F1xx/RTC/main.c
@@ -24,7 +24,7 @@
 RTCTime timespec;
 RTCAlarm alarmspec;
 
-#define TEST_ALARM_WAKEUP TRUE
+#define TEST_ALARM_WAKEUP FALSE
 
 #if TEST_ALARM_WAKEUP
 
@@ -90,7 +90,9 @@ static void my_cb(RTCDriver *rtcp, rtcevent_t event) {
     break;
   case RTC_EVENT_ALARM:
     palTogglePad(GPIOC, GPIOC_LED);
+    chSysLockFromIsr();
     chBSemSignalI(&alarm_sem);
+    chSysUnlockFromIsr();
     break;
   }
 }