--- read.h.dist	2006-01-19 10:44:37.000000000 -0800
+++ read.h	2006-01-19 10:50:59.000000000 -0800
@@ -27,6 +27,8 @@
 #ifndef __CDIO_READ_H__
 #define __CDIO_READ_H__
 
+#include <unistd.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */