diff --git a/rings.ixx b/rings.ixx
index 4adaab3..b302f9e 100644
--- a/rings.ixx
+++ b/rings.ixx
@@ -6,6 +6,7 @@ module;
 
 export module rings;
 
+import cd.cd;
 import cd.cdrom;
 import cd.subcode;
 import dump;