--- src/graphics.ogl.c.orig	2001-11-10 02:38:22.000000000 +0900
+++ src/graphics.ogl.c	2020-11-21 16:04:27.000000000 +0900
@@ -57,6 +57,8 @@
 #include "mwmborder.h"
 #include <sys/stat.h>
 #include "xdump.h"
+#include "pngdump.h"
+#include "gl_to_ppm.h"
 
 GLuint v5d_glGenLists(GLsizei  cnt);