Index: uspace/app/testwrit/testwrit.c
===================================================================
--- uspace/app/testwrit/testwrit.c	(revision 8ad547002151caebceb0d8867e9f2283f118e867)
+++ uspace/app/testwrit/testwrit.c	(revision fa3704ded00cb0310282948a2e68e46e6fe7d813)
@@ -33,4 +33,5 @@
 
 #include <stdio.h>
+#include <unistd.h>
 
 #define BUF_SIZE 1024