diff -r 3f22f3a0051b src/events.c
--- a/src/events.c	Sat Oct 03 14:42:28 2020 +0000
+++ b/src/events.c	Sat Oct 03 14:42:42 2020 +0000
@@ -38,7 +38,7 @@
 
 extern Board *board;
 extern Configuration *conf;
-SDL_Surface *screen;
+extern SDL_Surface *screen;
 Cube *speedy;			// currently accelerated cube