--- flip.c

+++ flip.c

@@ -7,6 +7,7 @@

 #include <stdlib.h>

 #include <stdio.h>

+#include <string.h>

 #include <sys/time.h>

 #include <unistd.h>

 #include <aalib.h>

--- main.c

+++ main.c

@@ -2,6 +2,7 @@

 #include "image.h"

 #include "ui.h"

 #include "config.h"

+#include <string.h>

 #define NAMELEN 256