Use #ifdef in stead of #if (Jack)

gvanrossum · gvanrossum · commit 1254d79dfaf5 · 1997-05-20T15:57:25.000Z
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
@@ -48,7 +48,7 @@ Data members:
 
 #include "osdefs.h"
 
-#if HAVE_UNISTD_H
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 
