diff --git a/static/js/BLE.js b/static/js/BLE.js
index dda6be5..c73c104 100644
--- a/static/js/BLE.js
+++ b/static/js/BLE.js
@@ -12,8 +12,8 @@ async function connect(props) {
   return char;
 }
 
-function parseCSC({ value }) {
-  const flags = value.getUint8(0, true);
+function parseCSC(e) {
+  const flags = e.target.value.getUint8(0, true);
   const hasWheel = !!(flags & 0x01);
   const hasCrank = !!(flags & 0x02);
   let index = 1;