diff --git a/test/unittest/common/src/system_info.cpp b/test/unittest/common/src/system_info.cpp
index d0f5d6487cb6eaf76c4ea26836324004dde03322..f21a27ccc692ec0b483493464034f8c8cec5119f 100755
--- a/test/unittest/common/src/system_info.cpp
+++ b/test/unittest/common/src/system_info.cpp
@@ -23,6 +23,7 @@
 #include <string>
 #include <thread>
 
+#include "securec.h"
 #include "sensors_errors.h"
 
 namespace OHOS {
@@ -75,7 +76,9 @@ int32_t CpuInfo::GetTaskPidFile(const std::string& process_name)
         }
         while (std::getline(filePath, strLine)) {
             if ((strLine.find("Pid")) != std::string::npos) {
-                (void)::sscanf(strLine.c_str(), "%*s%d", &pid);
+                if (sscanf_s(strLine.c_str(), "%*s%d", &pid) == -1) {
+                    SEN_HILOGE("sscanf_s failed");
+                }
                 break;
             }
         }