diff --git a/src/main/java/baritone/bot/pathing/movement/ActionCosts.java b/src/main/java/baritone/bot/pathing/movement/ActionCosts.java
index 79069d50e..d21b93842 100644
--- a/src/main/java/baritone/bot/pathing/movement/ActionCosts.java
+++ b/src/main/java/baritone/bot/pathing/movement/ActionCosts.java
@@ -44,5 +44,9 @@ public interface ActionCosts extends ActionCostsButOnlyTheOnesThatMakeMickeyDieI
      */
     double PLACE_ONE_BLOCK_COST = 20;
 
+    /**
+     * don't make this Double.MAX_VALUE because it's added to other things, maybe other COST_INFs,
+     * and that would make it overflow to negative
+     */
     double COST_INF = 1000000;
 }