diff --git a/components/drivers/include/drivers/alarm.h b/components/drivers/include/drivers/alarm.h
index 6ea9f5e2710cbfa3d11a8f46d2912944f19eb580..bd631edac184b819fc959fc3d40e643860bbea32 100644
--- a/components/drivers/include/drivers/alarm.h
+++ b/components/drivers/include/drivers/alarm.h
@@ -20,7 +20,7 @@
                                         to now.we also call it "don't care" value */
 
 /* alarm flags */
-#define RT_ALARM_ONESHOT       0x000 /* only alarm onece */
+#define RT_ALARM_ONESHOT       0x000 /* only alarm once */
 #define RT_ALARM_DAILY         0x100 /* alarm everyday */
 #define RT_ALARM_WEEKLY        0x200 /* alarm weekly at Monday or Friday etc. */
 #define RT_ALARM_MONTHLY       0x400 /* alarm monthly at someday */
diff --git a/components/drivers/rtc/alarm.c b/components/drivers/rtc/alarm.c
index f6c536d3540ef62c295aecafbdb7c6a672135e65..56c74306413197d864646267ec8dbc88e746b39d 100644
--- a/components/drivers/rtc/alarm.c
+++ b/components/drivers/rtc/alarm.c
@@ -718,7 +718,7 @@ struct _alarm_flag
 static const struct _alarm_flag _alarm_flag_tbl[] =
 {
     {"N",        0xffff}, /* none */
-    {"O",       RT_ALARM_ONESHOT}, /* only alarm onece */
+    {"O",       RT_ALARM_ONESHOT}, /* only alarm once */
     {"D",       RT_ALARM_DAILY}, /* alarm everyday */
     {"W",       RT_ALARM_WEEKLY}, /* alarm weekly at Monday or Friday etc. */
     {"Mo",      RT_ALARM_MONTHLY}, /* alarm monthly at someday */