diff --git a/lucene/src/java/org/apache/lucene/index/TermsHash.java b/lucene/src/java/org/apache/lucene/index/TermsHash.java
index e4e9752ad10..bdc5ed5d812 100644
--- a/lucene/src/java/org/apache/lucene/index/TermsHash.java
+++ b/lucene/src/java/org/apache/lucene/index/TermsHash.java
@@ -63,7 +63,7 @@ final class TermsHash extends InvertedDocConsumer {
   }
 
   @Override
-  synchronized public void abort() {
+  public void abort() {
     consumer.abort();
     if (nextTermsHash != null)
       nextTermsHash.abort();