diff --git a/windows/winstuff.h b/windows/winstuff.h
index dfa032f4..10fcdaba 100644
--- a/windows/winstuff.h
+++ b/windows/winstuff.h
@@ -533,8 +533,9 @@ GLOBAL int restricted_acl;
 #ifndef LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR
 #define LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR 0x00000100
 #endif
-#if _MSC_VER < 1400
+#ifndef DLL_DIRECTORY_COOKIE
 typedef PVOID DLL_DIRECTORY_COOKIE;
+DECLSPEC_IMPORT DLL_DIRECTORY_COOKIE WINAPI AddDllDirectory (PCWSTR NewDirectory);
 #endif
 
 /*