diff --git a/UDF/tg_ExprUtil.hpp b/UDF/tg_ExprUtil.hpp
index 8346b673..9d9d906b 100644
--- a/UDF/tg_ExprUtil.hpp
+++ b/UDF/tg_ExprUtil.hpp
@@ -38,6 +38,7 @@
 #include <random>
 #include <fstream>
 #include <sstream>
+#include <curl/curl.h>
 
 namespace tg {