diff --git a/apps/fwupdate/custom.html b/apps/fwupdate/custom.html
index ae955aded..fd16aa878 100644
--- a/apps/fwupdate/custom.html
+++ b/apps/fwupdate/custom.html
@@ -12,7 +12,8 @@
     <a href="https://www.espruino.com/Bangle.js#firmware-updates" target="_blank">see the Bangle.js 1 instructions</a></b></p>
   </div>
     <ul>
-    <p>Your current firmware version is <span id="fw-version" style="font-weight:bold">unknown</span> and DFU is <span id="boot-version" style="font-weight:bold">unknown</span></p>
+    <p>Your current firmware version is <span id="fw-version" style="font-weight:bold">unknown</span> and DFU is <span id="boot-version" style="font-weight:bold">unknown</span>. 
+    The DFU (bootloader) rarely changes, so it does not have to be the same version as your main firmware.</p>
   </ul>
     <div id="fw-ok" style="display:none">
       <p  id="fw-old-bootloader-msg">If you have an early (KickStarter or developer) Bangle.js device and still have the old 2v10.x DFU, the Firmware Update