diff --git a/mdx/_rules/check_future_2.xsl b/mdx/_rules/check_future_2.xsl
index ee51f733..0b697102 100644
--- a/mdx/_rules/check_future_2.xsl
+++ b/mdx/_rules/check_future_2.xsl
@@ -27,4 +27,27 @@
     -->
     <xsl:import href="check_framework.xsl"/>
 
+    <!--
+
+        Check whether md:OrganizationDisplayname matches mdui:DisplayName for SPs
+
+        See ukf/ukf-data#325
+
+    -->
+    <xsl:template match="md:EntityDescriptor[md:SPSSODescriptor]">
+        <xsl:variable name="mdui" select="md:SPSSODescriptor/md:Extensions/mdui:UIInfo/mdui:DisplayName[@xml:lang='en']"/>
+        <xsl:variable name="odn" select="md:Organization/md:OrganizationDisplayName[@xml:lang='en']"/>
+        <xsl:if test="$mdui and $odn and $mdui != $odn">
+            <xsl:call-template name="error">
+                <xsl:with-param name="m">
+                    <xsl:text>mismatched xml:lang='en' DisplayNames: '</xsl:text>
+                    <xsl:value-of select="$mdui"/>
+                    <xsl:text>' in mdui vs. '</xsl:text>
+                    <xsl:value-of select="$odn"/>
+                    <xsl:text>' in ODN</xsl:text>
+                </xsl:with-param>
+            </xsl:call-template>
+        </xsl:if>
+    </xsl:template>
+
 </xsl:stylesheet>