diff --git a/include/os/osFile.h b/include/os/osFile.h
index 8d03759d82..2b0abc60ae 100644
--- a/include/os/osFile.h
+++ b/include/os/osFile.h
@@ -54,7 +54,7 @@ int32_t taosFtruncateFile(FileFd fd, int64_t length);
 int32_t taosFsyncFile(FileFd fd);
 
 int64_t taosReadFile(FileFd fd, void *buf, int64_t count);
-int64_t taosWriteFile(FileFd fd, void *buf, int64_t count);
+int64_t taosWriteFile(FileFd fd, const void *buf, int64_t count);
 
 void taosCloseFile(FileFd fd);
 
diff --git a/source/os/src/osFile.c b/source/os/src/osFile.c
index bdf3a53dcb..60155c8fb9 100644
--- a/source/os/src/osFile.c
+++ b/source/os/src/osFile.c
@@ -120,7 +120,7 @@ int64_t taosReadFile(FileFd fd, void *buf, int64_t count) {
   return count;
 }
 
-int64_t taosWriteFile(FileFd fd, void *buf, int64_t n) {
+int64_t taosWriteFile(FileFd fd, const void *buf, int64_t n) {
   int64_t nleft = n;
   int64_t nwritten = 0;
   char *  tbuf = (char *)buf;