diff --git a/web/application.js b/web/application.js
index 228bf19a..152bc726 100644
--- a/web/application.js
+++ b/web/application.js
@@ -890,7 +890,7 @@ var fetch = function() {
 
 var upgrade = function() {
     if(nextVersion) {
-        if(confirm("WARNING: If you have a BUS powered device (Pow-U), please keep USB power connected while upgrading.\n\nAre you sure you want to perform upgrade to " + nextVersion.tag_name + "?")) {
+        if(confirm("WARNING: If you have a M-BUS powered device (Pow-U), please keep USB power connected while upgrading.\n\nAre you sure you want to perform upgrade to " + nextVersion.tag_name + "?")) {
             $('#loading-indicator').show();
             window.location.href="/upgrade?version=" + nextVersion.tag_name;
         }
diff --git a/web/firmware.html b/web/firmware.html
index b7c99222..3ae1fd88 100644
--- a/web/firmware.html
+++ b/web/firmware.html
@@ -1,5 +1,5 @@
 <div class="alert alert-danger">
-    WARNING: Units powered by BUS (Pow-U) must be connected to an external power supply during firmware upload. Failure to do so may cause power-down during upload resulting in non-functioning unit.
+    WARNING: Units powered by M-BUS (Pow-U) must be connected to an external power supply during firmware upload. Failure to do so may cause power-down during upload resulting in non-functioning unit.
 </div>
 <div class="alert alert-warning">
     Your board is using {chipset} chipset. Only upload firmware designed for this chipset. Failure to do so may result in non-functioning unit.