--- a/include/SDL_thread.h	Tue Feb 21 08:34:45 2006 +0000
+++ b/include/SDL_thread.h	Tue Feb 21 08:46:50 2006 +0000
@@ -45,7 +45,7 @@
 typedef struct SDL_Thread SDL_Thread;
 
 /* Create a thread */
-#if defined(_WIN32) || defined(__OS2__)
+#if defined(__WIN32__) || defined(__OS2__)
 /*
    We compile SDL into a DLL on OS/2. This means, that it's the DLL which
    creates a new thread for the calling process with the SDL_CreateThread()