diff --git a/mdx/check_future_4.xsl b/mdx/check_future_4.xsl
index 92219973..2bf7d00f 100644
--- a/mdx/check_future_4.xsl
+++ b/mdx/check_future_4.xsl
@@ -29,5 +29,18 @@
 	-->
 	<xsl:import href="../build/check_framework.xsl"/>
 
+	<xsl:template match="md:ArtifactResolutionService
+		[@Binding != 'urn:oasis:names:tc:SAML:1.0:bindings:SOAP-binding']
+		[@Binding != 'urn:oasis:names:tc:SAML:2.0:bindings:SOAP']
+		">
+		<xsl:call-template name="error">
+			<xsl:with-param name="m">
+				<xsl:text>invalid binding '</xsl:text>
+				<xsl:value-of select="@Binding"/>
+				<xsl:text>' on </xsl:text>
+				<xsl:value-of select="name()"/>
+			</xsl:with-param>
+		</xsl:call-template>
+	</xsl:template>
 	
 </xsl:stylesheet>