diff --git a/dap_chain_gdb.c b/dap_chain_gdb.c
index 221db002274817917eda075f85de33cf4e7bb0d1..3dfda8f017bff07f15bc081d8c524e0cd485d50b 100644
--- a/dap_chain_gdb.c
+++ b/dap_chain_gdb.c
@@ -27,8 +27,6 @@
 #include <pthread.h>
 
 #ifdef _WIN32
-#undef _WIN32_WINNT
-#define _WIN32_WINNT 0x0600
 #include <winsock2.h>
 #include <windows.h>
 #include <mswsock.h>