diff --git a/liberty.c b/liberty.c
index df42e4a..bb37f30 100644
--- a/liberty.c
+++ b/liberty.c
@@ -37,6 +37,7 @@
 #include <sys/wait.h>
 #include <sys/stat.h>
 #include <sys/time.h>
+#include <sys/uio.h>
 #include <fcntl.h>
 #include <poll.h>
 #include <signal.h>