diff --git a/plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/references/ModeReference.java b/plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/references/ModeReference.java
index 19a66d96cd77..3867949f0b27 100644
--- a/plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/references/ModeReference.java
+++ b/plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/references/ModeReference.java
@@ -190,7 +190,7 @@ class ModeReference extends SimpleAttributeReference implements PsiPolyVariantRe
     public String getUnresolvedMessagePattern() {
         final QName qName = myImplicitModeElement.getQName();
         if (qName != null && qName != QNameUtil.UNRESOLVED) {
-            return "Undefined mode ''" + qName.toString() + "''";
+            return "Undefined mode '" + qName.toString() + "'";
         } else {
             return "Undefined mode ''{0}''";
         }