diff --git a/src/Mono.cs b/src/Mono.cs
index 0b19d99..d3c2978 100644
--- a/src/Mono.cs
+++ b/src/Mono.cs
@@ -53,7 +53,7 @@ static class Mono
 
     public static void Frame()
     {
-        if (Rig.btn_trigger.delta == +1)
+        if (Rig.btn_back.delta == +1)
         {
             menu = !menu;
             SFX.click.PlayBox(new XYZi(0, 0, Mono.SD_Z + 1));