diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index d86bf15d10..85b14d6017 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -124,7 +124,10 @@ static int32_t udfSpawnUdfd(SUdfdData *pData) {
 
   char pathTaosdLdLib[512] = {0};
   size_t taosdLdLibPathLen = sizeof(pathTaosdLdLib);
-  uv_os_getenv("LD_LIBRARY_PATH", pathTaosdLdLib, &taosdLdLibPathLen);
+  int ret = uv_os_getenv("LD_LIBRARY_PATH", pathTaosdLdLib, &taosdLdLibPathLen);
+  if (ret != UV_ENOBUFS) {
+    taosdLdLibPathLen = strlen(pathTaosdLdLib);
+  }
 
   char udfdPathLdLib[1024] = {0};
   size_t udfdLdLibPathLen = strlen(tsUdfdLdLibPath);