diff --git a/src/mame/includes/apollo.h b/src/mame/includes/apollo.h
index 4f618783d90..7428196a9ca 100644
--- a/src/mame/includes/apollo.h
+++ b/src/mame/includes/apollo.h
@@ -36,6 +36,7 @@
 #include "bus/rs232/rs232.h"
 
 #include "diserial.h"
+#include "screen.h"
 
 #ifndef VERBOSE
 #define VERBOSE 0