diff --git a/kernel/base/sched/sched_sq/los_sched.c b/kernel/base/sched/sched_sq/los_sched.c
index 6f082e450cd39e9ebca5757d5006d672df16202a..0ce15070e12e83ec831c04643cd310380e6453c2 100755
--- a/kernel/base/sched/sched_sq/los_sched.c
+++ b/kernel/base/sched/sched_sq/los_sched.c
@@ -63,7 +63,7 @@ extern "C" {
 #define OS_SCHED_TIME_SLICES_MAX   ((LOSCFG_BASE_CORE_TIMESLICE_TIMEOUT * OS_SYS_NS_PER_US) / OS_NS_PER_CYCLE)
 #define OS_SCHED_TIME_SLICES_DIFF  (OS_SCHED_TIME_SLICES_MAX - OS_SCHED_TIME_SLICES_MIN)
 #define OS_SCHED_READY_MAX         30
-#define OS_TIME_SLICE_MIN          ((50 * OS_SYS_NS_PER_US) / OS_NS_PER_CYCLE) /* 50us */
+#define OS_TIME_SLICE_MIN          (INT32)((50 * OS_SYS_NS_PER_US) / OS_NS_PER_CYCLE) /* 50us */
 #define OS_SCHED_MAX_RESPONSE_TIME (UINT64)(OS_64BIT_MAX - 1U)
 
 typedef struct {