diff --git a/utils/common/src/file_utils.cpp b/utils/common/src/file_utils.cpp
index 929255aaebaf23f842cf01a48fe2238a5f895775..cc2b195b78c6d9ed71d66f48f909d5f89b5229bc 100755
--- a/utils/common/src/file_utils.cpp
+++ b/utils/common/src/file_utils.cpp
@@ -108,7 +108,7 @@ int32_t GetFileName(const int32_t &fd, std::string &fileName)
     char buf[FILE_PATH_MAX] = {'\0'};
     char filePath[FILE_PATH_MAX] = {'\0'};
 
-    int ret = snprintf_s(buf, sizeof(buf), sizeof(buf), "/proc/self/fd/%d", fd);
+    int ret = snprintf_s(buf, sizeof(buf), (sizeof(buf) - 1), "/proc/self/fd/%d", fd);
     if (ret < 0) {
         MISC_HILOGE("snprintf failed with %{public}d", errno);
         return ERROR;