diff --git a/java/java-impl-refactorings/src/com/intellij/refactoring/extractInterface/ExtractInterfaceHandler.java b/java/java-impl-refactorings/src/com/intellij/refactoring/extractInterface/ExtractInterfaceHandler.java
index 5d6fc06ef3ab..8fa081eeed00 100644
--- a/java/java-impl-refactorings/src/com/intellij/refactoring/extractInterface/ExtractInterfaceHandler.java
+++ b/java/java-impl-refactorings/src/com/intellij/refactoring/extractInterface/ExtractInterfaceHandler.java
@@ -29,10 +29,7 @@ import com.intellij.util.containers.MultiMap;
 import org.jetbrains.annotations.Nls;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
+import java.util.*;
 
 public class ExtractInterfaceHandler implements ElementsHandler, ContextAwareActionHandler {
 
@@ -74,6 +71,12 @@ public class ExtractInterfaceHandler implements ElementsHandler, ContextAwareAct
       return;
     }
 
+    if (myClass instanceof PsiUnnamedClass) {
+      String message = RefactoringBundle.message("error.interface.cannot.be.extracted.from.unnamed.class");
+      CommonRefactoringUtil.showErrorHint(project, null, message, getRefactoringName(), HelpID.EXTRACT_INTERFACE);
+      return;
+    }
+
     if (!CommonRefactoringUtil.checkReadOnlyStatus(project, myClass)) return;
 
     final Set<PsiElement> selectedMembers = new HashSet<>();
diff --git a/platform/refactoring/resources/messages/RefactoringBundle.properties b/platform/refactoring/resources/messages/RefactoringBundle.properties
index 4649224fe997..7ded3b553b00 100644
--- a/platform/refactoring/resources/messages/RefactoringBundle.properties
+++ b/platform/refactoring/resources/messages/RefactoringBundle.properties
@@ -10,6 +10,7 @@ error.wrong.caret.position.method.or.class.name=Caret should be positioned at th
 error.wrong.caret.position.method.or.variable.name=Caret should be positioned at the name of method or variable to be refactored
 error.wrong.caret.position.class=Caret should be positioned inside class to be refactored
 error.select.class.to.be.refactored=Cannot perform the refactoring.\nThe refactoring should be invoked on the class or members to be refactored.
+error.interface.cannot.be.extracted.from.unnamed.class=Cannot perform the refactoring.\nCannot extract interface from unnamed class
 error.wrong.caret.position.method.or.local.name=Caret should be positioned at the name of element to be refactored
 error.wrong.caret.position.symbol.to.rename=Caret should be positioned at symbol to be renamed
 error.wrong.caret.position.symbol.to.refactor=Caret should be positioned at symbol to be refactored