diff --git a/services/samgr/native/source/collect/common_event_collect.cpp b/services/samgr/native/source/collect/common_event_collect.cpp
index 6f6ca8b8567dc6c4d6442c396ef088f5c3e90272..2b01a069b5dbd01a265610f64600caddab7f11bb 100644
--- a/services/samgr/native/source/collect/common_event_collect.cpp
+++ b/services/samgr/native/source/collect/common_event_collect.cpp
@@ -805,7 +805,7 @@ float CommonEventCollect::GetCpuUsage(const char* file, uint32_t interval)
 void CommonEventCollect::MonitorCpuUsageThread()
 {
     struct sysinfo info;
-    uint64_t coreNum = sysconf(_SC_NPROCESSORS_ONLN);
+    uint64_t coreNum = static_cast<uint64_t>(sysconf(_SC_NPROCESSORS_ONLN));
     uint64_t baseLoad = coreNum << CPU_LOAD_SHIFT;
     pthread_setname_np(pthread_self(), "OS_CPU_MONITOR");