Index: build/cackey_win32_build/include/pcsclite.h
==================================================================
--- build/cackey_win32_build/include/pcsclite.h
+++ build/cackey_win32_build/include/pcsclite.h
@@ -1,1 +1,2 @@
+#define _WIN32_WINNT 0x500
 #include <windows.h>

Index: build/cackey_win64_build/include/pcsclite.h
==================================================================
--- build/cackey_win64_build/include/pcsclite.h
+++ build/cackey_win64_build/include/pcsclite.h
@@ -1,1 +1,2 @@
+#define _WIN32_WINNT 0x500
 #include <windows.h>