diff --git a/platform/ide-core/src/com/intellij/util/proxy/NonStaticAuthenticator.java b/platform/ide-core/src/com/intellij/util/proxy/NonStaticAuthenticator.java
index 9e31054a46b4..348f3e3d5048 100644
--- a/platform/ide-core/src/com/intellij/util/proxy/NonStaticAuthenticator.java
+++ b/platform/ide-core/src/com/intellij/util/proxy/NonStaticAuthenticator.java
@@ -120,7 +120,7 @@ public abstract class NonStaticAuthenticator {
     return wrapper;
   }
 
-  private class AuthenticatorWrapper extends Authenticator {
+  private final class AuthenticatorWrapper extends Authenticator {
     @Override
     protected PasswordAuthentication getPasswordAuthentication() {
       synchronized (NonStaticAuthenticator.this) {