diff --git a/usr/local/www/system_firmware_settings.php b/usr/local/www/system_firmware_settings.php
index 916a3c23ab..2ef4654737 100755
--- a/usr/local/www/system_firmware_settings.php
+++ b/usr/local/www/system_firmware_settings.php
@@ -116,7 +116,12 @@ function enable_altfirmwareurl(enable_over) {
 			<table>
 			<tr><td>Base URL:</td><td><input name="firmwareurl" type="input" class="formfld url" id="firmwareurl" size="64" value="<?php if($curcfg['alturl']['firmwareurl']) echo $curcfg['alturl']['firmwareurl']; else echo $g['']; ?>"></td></tr>
 			</table>
-			<span class="vexpl">This is where <?php echo $g['product_name'] ?> will check for newer firmware versions when the <a href="system_firmware_check.php">System: Firmware: Auto Update</a> page is viewed.</span></td>
+			<span class="vexpl">
+				This is where <?php echo $g['product_name'] ?> will check for newer firmware versions when the <a href="system_firmware_check.php">System: Firmware: Auto Update</a> page is viewed.
+				<p/>
+				<b>NOTE:</b> When a custom URL is enabled the system will not verify the digital signature from <?php echo $g['product_website'] ?>.
+				</span>
+				</td>
 	</tr>
 	<script>enable_altfirmwareurl();</script>
                 <tr>