diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index e3714be594..a3bfd6e3d2 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -317,10 +317,10 @@ static void taosGetLogFileName(char *fn) {
     for (int32_t i = 0; i < tsLogObj.fileNum; i++) {
       char fileName[LOG_FILE_NAME_LEN];
 
-      sprintf(fileName, "%s%d.0", fn, i);
+      snprintf(fileName, LOG_FILE_NAME_LEN,"%s%d.0", fn, i);
       bool file1open = taosCheckFileIsOpen(fileName);
 
-      sprintf(fileName, "%s%d.1", fn, i);
+      snprintf(fileName, LOG_FILE_NAME_LEN,"%s%d.1", fn, i);
       bool file2open = taosCheckFileIsOpen(fileName);
 
       if (!file1open && !file2open) {