diff --git a/xml/xml-psi-impl/src/com/intellij/xml/util/XmlUtil.java b/xml/xml-psi-impl/src/com/intellij/xml/util/XmlUtil.java
index 757f827bb212..c8373bd46c63 100644
--- a/xml/xml-psi-impl/src/com/intellij/xml/util/XmlUtil.java
+++ b/xml/xml-psi-impl/src/com/intellij/xml/util/XmlUtil.java
@@ -729,7 +729,7 @@ public class XmlUtil {
     if (file != null) {
 
       final Language language = file.getLanguage();
-      if (language == HTMLLanguage.INSTANCE || language == XHTMLLanguage.INSTANCE) {
+      if (language.isKindOf(HTMLLanguage.INSTANCE) || language == XHTMLLanguage.INSTANCE) {
         return new String[][]{new String[]{"", XHTML_URI}};
       }
     }