1 files changed, 1 insertions, 0 deletions
diff --git a/rules.js b/rules.js
index 9f4a99e..1a1d283 100644
--- a/rules.js
+++ b/rules.js
@@ -2940,6 +2940,7 @@ states.vm_move_disc = {
 	},
 	piece(p) {
 		push_undo()
+		let s = game.pieces[p]
 		if (game.active === COMMUNE)
 			log("Moved RD from S" + s + ".")
 		else