Assume HAVE_UNISTD_H.

diff --git a/src/system.h b/src/system.h
index 1af6e82..cb6158f 100644 (file)
--- a/src/system.h
+++ b/src/system.h
@@ -35,9 +35,7 @@ you must include <sys/types.h> before including this file
 # include <sys/param.h>
 #endif
 
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 #ifndef STDIN_FILENO
 # define STDIN_FILENO 0