diff --git a/examples/sky-shell-exec/sky-shell-exec.c b/examples/sky-shell-exec/sky-shell-exec.c
index 1d692e9f4..90ea6e71b 100644
--- a/examples/sky-shell-exec/sky-shell-exec.c
+++ b/examples/sky-shell-exec/sky-shell-exec.c
@@ -51,9 +51,6 @@
 #include <stdio.h>
 #include <string.h>
 
-#include <io.h>
-#include <signal.h>
-
 /*---------------------------------------------------------------------------*/
 PROCESS(sky_shell_process, "Sky Contiki shell");
 AUTOSTART_PROCESSES(&sky_shell_process);