diff --git a/kal/posix/src/time.c b/kal/posix/src/time.c
index 838be5a1..adf3ca76 100644
--- a/kal/posix/src/time.c
+++ b/kal/posix/src/time.c
@@ -188,7 +188,8 @@ int timer_settime(timer_t timerID, int flags,
     intSave = LOS_IntLock();
     swtmr = OS_SWT_FROM_SID(swtmrID);
     swtmr->ucMode = (interval ? LOS_SWTMR_MODE_PERIOD : LOS_SWTMR_MODE_NO_SELFDELETE);
-    swtmr->uwInterval = interval;
+    swtmr->uwInterval = (interval ? interval : expiry);
+
     LOS_IntRestore(intSave);
 
     if ((value->it_value.tv_sec == 0) && (value->it_value.tv_nsec == 0)) {