diff --git a/crypto/md5/md5_locl.h b/crypto/md5/md5_locl.h
index 222639788..9d04696db 100644
--- a/crypto/md5/md5_locl.h
+++ b/crypto/md5/md5_locl.h
@@ -66,7 +66,7 @@
 #endif
 
 #ifdef MD5_ASM
-# if defined(__i386) || defined(WIN32)
+# if defined(__i386) || defined(_M_IX86)
 #  define md5_block_host_order md5_block_asm_host_order
 # elif defined(__sparc) && defined(ULTRASPARC)
    void md5_block_asm_data_order_aligned (MD5_CTX *c, const MD5_LONG *p,int num);
@@ -77,7 +77,7 @@
 void md5_block_host_order (MD5_CTX *c, const void *p,int num);
 void md5_block_data_order (MD5_CTX *c, const void *p,int num);
 
-#if defined(__i386)
+#if defined(__i386) || defined(_M_IX86)
 /*
  * *_block_host_order is expected to handle aligned data while
  * *_block_data_order - unaligned. As algorithm and host (x86)