diff --git a/src/dbg/_global.h b/src/dbg/_global.h
index c73d7f9c..37416281 100644
--- a/src/dbg/_global.h
+++ b/src/dbg/_global.h
@@ -1,7 +1,7 @@
 #ifndef _GLOBAL_H
 #define _GLOBAL_H
 
-#define _WIN32_WINNT 0x0601
+#define _WIN32_WINNT 0x0501
 #define WINVER 0x0501
 #define _WIN32_IE 0x0500