diff --git a/os/sb/host/sbvrq.c b/os/sb/host/sbvrq.c
index 480a2594a..eeb7f1410 100644
--- a/os/sb/host/sbvrq.c
+++ b/os/sb/host/sbvrq.c
@@ -246,9 +246,9 @@ void sbVRQTriggerFromISR(sb_class_t *sbp, sb_vrqmask_t vmask) {
 void sb_api_vrq_set_alarm(struct port_extctx *ectxp) {
   sb_class_t *sbp = (sb_class_t *)chThdGetSelfX()->ctx.syscall.p;
   sysinterval_t interval = (sysinterval_t )ectxp->r0;
-  bool continuous = (bool)ectxp->r1;
+  bool reload = (bool)ectxp->r1;
 
-  if (continuous) {
+  if (reload) {
     chVTSetContinuous(&sbp->alarm_vt, interval, delay_cb, (void *)sbp);
   }
   else {
diff --git a/os/sb/user/sbuser.h b/os/sb/user/sbuser.h
index fa3887d89..54d5c6fb7 100644
--- a/os/sb/user/sbuser.h
+++ b/os/sb/user/sbuser.h
@@ -843,6 +843,31 @@ static inline void sbSleepMicroseconds(time_usecs_t usecs) {
   sbSleep(sbTimeUS2I(usecs));
 }
 
+/**
+ * @brief   Sets an alarm.
+ * @note    On alarm a VRQ is triggered, the VRQ number is hard-coded in the
+ *          sandbox configuration, default is zero.
+ *
+ * @param[in] interval  the interval in system ticks
+ * @param[in] reload    specifies a periodic alarm
+ *
+ * @api
+ */
+static inline void sbSetAlarm(sysinterval_t interval, bool reload) {
+
+  __syscall2r(245, (uint32_t)interval, (uint32_t)reload);
+}
+
+/**
+ * @brief   Resets an alarm.
+ *
+ * @api
+ */
+static inline void sbResetAlarm(void) {
+
+  __syscall0(246);
+}
+
 /**
  * @brief   VRQ @p wait pseudo-instruction.
  *