diff --git a/asbeats/asbeats.c b/asbeats/asbeats.c
index efc449e..378e74b 100644
--- a/asbeats/asbeats.c
+++ b/asbeats/asbeats.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <X11/Xlib.h>
 #include <X11/xpm.h>
 #include <X11/extensions/shape.h>