--- embedaddon/sudo/compat/sig2str.c	2013/07/22 10:46:11	1.1.1.2
+++ embedaddon/sudo/compat/sig2str.c	2014/06/15 16:12:54	1.1.1.3
@@ -37,6 +37,7 @@
 # include <strings.h>
 #endif /* HAVE_STRINGS_H */
 #include <signal.h>
+#include <unistd.h>
 
 #include "missing.h"