--- libeio/eio.h	2011/07/19 05:13:35	1.42
+++ libeio/eio.h	2011/07/19 05:18:22	1.43
@@ -69,7 +69,7 @@
 #ifdef _WIN32
   typedef int      eio_uid_t;
   typedef int      eio_gid_t;
-  #ifdef _MINGW32_ /* no intptr_t */
+  #ifdef __MINGW32__ /* no intptr_t */
     typedef ssize_t  eio_ssize_t;
   #else
     typedef intptr_t eio_ssize_t; /* or SSIZE_T */