diff --git a/src/boards/mmc3.h b/src/boards/mmc3.h
index 9dfbc920..644ea4ef 100644
--- a/src/boards/mmc3.h
+++ b/src/boards/mmc3.h
@@ -1,3 +1,5 @@
+#include "mapinc.h"
+
 extern uint8 MMC3_cmd;
 extern uint8 mmc3opts;
 extern uint8 A000B;