diff --git a/xml/xml-psi-impl/src/com/intellij/xml/impl/schema/XmlElementDescriptorImpl.java b/xml/xml-psi-impl/src/com/intellij/xml/impl/schema/XmlElementDescriptorImpl.java
index 25c2566f884b..748aa8ea07ed 100644
--- a/xml/xml-psi-impl/src/com/intellij/xml/impl/schema/XmlElementDescriptorImpl.java
+++ b/xml/xml-psi-impl/src/com/intellij/xml/impl/schema/XmlElementDescriptorImpl.java
@@ -16,10 +16,7 @@
 package com.intellij.xml.impl.schema;
 
 import com.intellij.codeInsight.daemon.Validator;
-import com.intellij.psi.ElementManipulators;
-import com.intellij.psi.PsiElement;
-import com.intellij.psi.PsiFile;
-import com.intellij.psi.PsiReference;
+import com.intellij.psi.*;
 import com.intellij.psi.meta.PsiWritableMetaData;
 import com.intellij.psi.util.PsiTreeUtil;
 import com.intellij.psi.xml.*;
@@ -568,7 +565,14 @@ public class XmlElementDescriptorImpl extends XsdEnumerationDescriptor<XmlTag>
 
   @Override
   public String toString() {
-    return getName() + " (" + getNamespace() + ")";
+    String namespace;
+    try {
+      namespace = getNamespace();
+    }
+    catch (PsiInvalidElementAccessException e) {
+      namespace = "!!!Invalid!!!";
+    }
+    return getName() + " (" + namespace + ")";
   }
 
   @Override