diff --git a/elasticsearch/src/main/java/org/hibernate/search/elasticsearch/impl/ElasticsearchIndexManager.java b/elasticsearch/src/main/java/org/hibernate/search/elasticsearch/impl/ElasticsearchIndexManager.java
index 8ec7ba1fd1a..b88daf16d8f 100644
--- a/elasticsearch/src/main/java/org/hibernate/search/elasticsearch/impl/ElasticsearchIndexManager.java
+++ b/elasticsearch/src/main/java/org/hibernate/search/elasticsearch/impl/ElasticsearchIndexManager.java
@@ -8,13 +8,12 @@
 
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Properties;
 import java.util.Set;
 
-import org.apache.lucene.analysis.Analyzer;
-import org.apache.lucene.search.similarities.Similarity;
 import org.hibernate.search.backend.FlushLuceneWork;
 import org.hibernate.search.backend.IndexingMonitor;
 import org.hibernate.search.backend.LuceneWork;
@@ -47,6 +46,9 @@
 import org.hibernate.search.util.configuration.impl.ConfigurationParseHelper;
 import org.hibernate.search.util.logging.impl.LoggerFactory;
 
+import org.apache.lucene.analysis.Analyzer;
+import org.apache.lucene.search.similarities.Similarity;
+
 /**
  * An {@link IndexManager} applying indexing work to an Elasticsearch server.
  *
@@ -387,14 +389,23 @@ public void performOperations(List<LuceneWork> workList, IndexingMonitor monitor
 
 	@Override
 	public void performStreamOperation(LuceneWork singleOperation, IndexingMonitor monitor, boolean forceAsync) {
-		if ( singleOperation == FlushLuceneWork.INSTANCE ) {
+		BackendRequest<?> request = singleOperation.acceptIndexWorkVisitor( visitor, monitor );
+		if ( singleOperation instanceof FlushLuceneWork ) {
 			requestProcessor.awaitAsyncProcessingCompletion();
+			executeBackendRequest( request, true );
 		}
 		else {
-			BackendRequest<?> request = singleOperation.acceptIndexWorkVisitor( visitor, monitor );
+			executeBackendRequest( request, false );
+		}
+	}
 
-			if ( request != null ) {
-				requestProcessor.executeAsync( request );
+	private void executeBackendRequest(BackendRequest<?> backendRequest, boolean sync) {
+		if ( backendRequest != null ) {
+			if ( sync ) {
+				requestProcessor.executeSync( Collections.<BackendRequest<?>>singletonList( backendRequest ) );
+			}
+			else {
+				requestProcessor.executeAsync( backendRequest );
 			}
 		}
 	}
diff --git a/elasticsearch/src/main/java/org/hibernate/search/elasticsearch/impl/ElasticsearchIndexWorkVisitor.java b/elasticsearch/src/main/java/org/hibernate/search/elasticsearch/impl/ElasticsearchIndexWorkVisitor.java
index e16bb835e31..8ef218aa286 100644
--- a/elasticsearch/src/main/java/org/hibernate/search/elasticsearch/impl/ElasticsearchIndexWorkVisitor.java
+++ b/elasticsearch/src/main/java/org/hibernate/search/elasticsearch/impl/ElasticsearchIndexWorkVisitor.java
@@ -10,6 +10,7 @@
 import java.util.Locale;
 import java.util.Set;
 
+import io.searchbox.indices.Flush;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.facet.FacetsConfig;
 import org.apache.lucene.index.DocValuesType;
@@ -138,8 +139,18 @@ public BackendRequest<?> visitUpdateWork(UpdateLuceneWork work, IndexingMonitor
 
 	@Override
 	public BackendRequest<?> visitFlushWork(FlushLuceneWork work, IndexingMonitor monitor) {
-		// Nothing to do
-		return null;
+		Flush flush = new Flush.Builder().setParameter( "wait_if_ongoing", "true" )
+				.addIndex( indexName )
+				.refresh( true )
+				.build();
+		return new BackendRequest<>(
+				flush,
+				work,
+				indexName,
+				monitor,
+				NoopBackendRequestSuccessHandler.INSTANCE,
+				false
+		);
 	}
 
 	@Override