diff --git a/config.def.h b/config.def.h
index c7710481e8..73c86689cb 100644
--- a/config.def.h
+++ b/config.def.h
@@ -34,6 +34,7 @@
 
 /* Required for 3DS display mode setting */
 #if defined(_3DS)
+#include <3ds.h>
 #include "gfx/common/ctr_defines.h"
 #endif