diff --git a/fb2png/fb.h b/fb2png/fb.h
index 25922c83..b82acba2 100644
--- a/fb2png/fb.h
+++ b/fb2png/fb.h
@@ -37,6 +37,7 @@ struct fb {
     void* data;
 };
 
+void fb_dump(const struct fb* fb);
 int fb_save_png(const struct fb *fb, const char *path);
 
 #endif
diff --git a/fb2png/fb2png.c b/fb2png/fb2png.c
index a357b7fe..1123b053 100644
--- a/fb2png/fb2png.c
+++ b/fb2png/fb2png.c
@@ -17,13 +17,15 @@
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/fb.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <fcntl.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
-#include <linux/fb.h>
-#include <errno.h>
+#include <sys/types.h>
+#include <unistd.h>
 
 #include "log.h"
 #include "fb2png.h"
diff --git a/fb2png/log.h b/fb2png/log.h
index 96e90d79..2b7cf8ce 100644
--- a/fb2png/log.h
+++ b/fb2png/log.h
@@ -21,6 +21,7 @@
 #define __KYAN_LOG_H__
 
 #include <errno.h>
+#include <string.h>
 
 #ifdef ANDROID_XXX
 
diff --git a/fb2png/main.c b/fb2png/main.c
index 84e08a96..235e958f 100644
--- a/fb2png/main.c
+++ b/fb2png/main.c
@@ -17,9 +17,12 @@
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
-#include <stdio.h>
+
 #include <limits.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+
 #include "fb2png.h"
 
 #ifdef ANDROID