diff --git a/threads.c b/threads.c
index c7e4f07..b9d6cae 100644
--- a/threads.c
+++ b/threads.c
@@ -1000,7 +1000,7 @@ xmlOnceInit(void)
 #elif defined(HAVE_WIN32_THREADS) && !defined(HAVE_COMPILER_TLS) && (!defined(LIBXML_STATIC) || defined(LIBXML_STATIC_FOR_DLL))
 #if defined(LIBXML_STATIC_FOR_DLL)
 BOOL XMLCALL
-xmlDllMain(void *hinstDLL, unsigned long fdwReason, void *lpvReserved)
+xmlDllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 #else
 BOOL WINAPI
 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)