diff --git a/data/magic.mse-game/script b/data/magic.mse-game/script
index 9312939bb..fc4976b3f 100644
--- a/data/magic.mse-game/script
+++ b/data/magic.mse-game/script
@@ -1019,7 +1019,7 @@ text_filter :=
 		replace: {"<nosym>" + mana_filter_t() + "</nosym>"} ) +
 	# step 5 : add mana & tap symbols
 	replace@(
-		match: "([+=-][XYZ0-9/|]+)",
+		match: "(?<!\\/)([+=-][XYZ0-9|]+)(?!\\/)",
 		in_context: mana_context,
 		replace: {"<sym-auto>" + _1 + "</sym-auto>"} ) +
 	replace@(