diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
index 67b415e056e..9bf39d31aec 100644
--- a/Zend/zend_alloc.c
+++ b/Zend/zend_alloc.c
@@ -33,7 +33,6 @@
 #endif
 
 #ifdef ZEND_WIN32
-# define _WIN32_WINNT 0x0400
 # include <wincrypt.h>
 # include <process.h>
 #endif