diff --git a/project_constants.py b/project_constants.py
index 5cb202a..c624a83 100644
--- a/project_constants.py
+++ b/project_constants.py
@@ -73,7 +73,7 @@ STRUCT_MINE_ATTRIBUTES = {
 # (int, int) - index "row,column" where row=int and column=int (used exclusively for chained mine)
 STRUCT_MINE_ATTRIBUTE_TYPES = {
     "standard": [],
-    "chained": [(int, int)],
+    "chained": [],
     "time": [int]
 }