diff --git a/perception.html b/perception.html
index 8b3e80d..ba5918f 100644
--- a/perception.html
+++ b/perception.html
@@ -460,7 +460,7 @@ flowchart TD
     UNDETECTED: {
       label: 'Undetected',
       cssClass: 'undetected',
-      effects: 'No opponent knows which square you occupy. You are <strong>off-guard</strong> to them. They must guess a square; the GM rolls secretly.',
+      effects: 'No opponent knows which square you occupy. They are <strong>off-guard</strong> to you. They must guess a square; the GM rolls secretly.',
     },
     UNNOTICED: {
       label: 'Unnoticed',