diff --git a/apps/trex/trex.js b/apps/trex/trex.js
index fe84cb31a..642c10054 100644
--- a/apps/trex/trex.js
+++ b/apps/trex/trex.js
@@ -9,8 +9,8 @@ g.flip = function() {
   },0,(240-128)/2,{scale:2});
 };
 var W = g.getWidth();
-var BTNL = BTN4;
-var BTNR = BTN5;
+var BTNL = BTN2;
+var BTNR = BTN3;
 var BTNU = BTN1;
 
 // Images can be added like this in Espruino v2.00
diff --git a/core b/core
index 3f2ff467f..0ba4c2bd5 160000
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 3f2ff467f22b746da94160e59ff89b621601b261
+Subproject commit 0ba4c2bd5503264279222b04a41505471c6622ff