diff --git a/src/main/java/baritone/behavior/PathingBehavior.java b/src/main/java/baritone/behavior/PathingBehavior.java
index ad2df5320..65ee41127 100644
--- a/src/main/java/baritone/behavior/PathingBehavior.java
+++ b/src/main/java/baritone/behavior/PathingBehavior.java
@@ -387,7 +387,11 @@ public final class PathingBehavior extends Behavior implements IPathingBehavior,
         if (current == start) {//can't check above because current and start can be equal even if currentPos and startPosition are not
             return Optional.empty();
         }
-        return Optional.of(current * ticksElapsedSoFar / (start - current));
+        double eta = current * ticksElapsedSoFar / (start - current);
+        if (eta < 0 || current < 0){
+            return Optional.empty();
+        }
+        return Optional.of(eta);
     }
 
     /**