1 files changed, 8 insertions, 1 deletions
diff --git a/xml/xml-psi-impl/src/com/intellij/psi/impl/source/html/dtd/HtmlAttributeDescriptorImpl.java b/xml/xml-psi-impl/src/com/intellij/psi/impl/source/html/dtd/HtmlAttributeDescriptorImpl.java
index 445a5503a855..d6bbd3ba3722 100644
--- a/xml/xml-psi-impl/src/com/intellij/psi/impl/source/html/dtd/HtmlAttributeDescriptorImpl.java
+++ b/xml/xml-psi-impl/src/com/intellij/psi/impl/source/html/dtd/HtmlAttributeDescriptorImpl.java
@@ -16,14 +16,16 @@
 package com.intellij.psi.impl.source.html.dtd;
 
 import com.intellij.psi.PsiElement;
+import com.intellij.psi.xml.XmlAttributeValue;
 import com.intellij.psi.xml.XmlElement;
 import com.intellij.util.ArrayUtil;
 import com.intellij.xml.XmlAttributeDescriptor;
+import com.intellij.xml.impl.BasicXmlAttributeDescriptor;
 
 /**
  * @author Maxim.Mossienko
  */
-public class HtmlAttributeDescriptorImpl implements XmlAttributeDescriptor {
+public class HtmlAttributeDescriptorImpl extends BasicXmlAttributeDescriptor {
   private final XmlAttributeDescriptor delegate;
   private final boolean myCaseSensitive;
 
@@ -90,4 +92,9 @@ public class HtmlAttributeDescriptorImpl implements XmlAttributeDescriptor {
   public String toString() {
     return delegate.toString();
   }
+
+  @Override
+  protected PsiElement getEnumeratedValueDeclaration(XmlAttributeValue attributeValue, String value) {
+    return super.getEnumeratedValueDeclaration(attributeValue, myCaseSensitive ? value : value.toLowerCase());
+  }
 }