diff --git a/admin/updatemetadata.xsl b/admin/updatemetadata.xsl
index 3021a5cc..b08aad32 100644
--- a/admin/updatemetadata.xsl
+++ b/admin/updatemetadata.xsl
@@ -16,6 +16,12 @@
 							<!-- Mount nav -->
 							<xsl:call-template name="mountnav" />
 							<h4>Update Metadata</h4>
+							<xsl:if test="content-type and not((content-type = 'application/mpeg') or (content-type = 'audio/aac') or (content-type = 'audio/aacp'))">
+								<p class="warning">
+									<strong>Warning</strong>
+									This is only supported for legacy codecs using ICY as transport such as MP3 and AAC.
+								</p>
+							</xsl:if>
 							<form method="post" action="/admin/metadata.xsl">
 								<input type="hidden" name="mount" value="{@mount}" />
 								<input type="hidden" name="mode" value="updinfo" />