diff --git a/book-12-lesson-2.module b/book-12-lesson-2.module
index 6840d185..84c30cf3 100644
--- a/book-12-lesson-2.module
+++ b/book-12-lesson-2.module
@@ -73,6 +73,7 @@ LINE: Jim bought the blue shirt instead of the yellow one. {bk12-l2a-f1-08.mp3}
 
 VOCAB: discussion
 LINE: Colonel Jones and Colonel Roberts had a discussion about the new mess hall. They talked about it for 30 minutes. {bk12-l2a-f1-09.mp3}
+NOTES: "mess hall" = a military dining hall (canteen)
 
 VOCAB: to discuss
 LINE: Captain Peterson wanted to discuss his score with his teacher. He wanted to talk to her about it. {bk12-l2a-f1-10.mp3}