1 files changed, 2 insertions, 0 deletions
diff --git a/rules.js b/rules.js
index 956b8c4..e350b60 100644
--- a/rules.js
+++ b/rules.js
@@ -3737,6 +3737,8 @@ states.remove_american_cu = {
 		gen_event_pass()
 	},
 	space(where) {
+		push_undo()
+		log("Removed CU from S" + where + ".")
 		if (count_american_cu(where) > 0)
 			remove_american_cu(where, 1)
 		else