diff --git a/modules/transport-netty4/src/main/java/org/elasticsearch/http/netty4/Netty4HttpServerTransport.java b/modules/transport-netty4/src/main/java/org/elasticsearch/http/netty4/Netty4HttpServerTransport.java
index 5fa73147429c6..66d36a8b4f835 100644
--- a/modules/transport-netty4/src/main/java/org/elasticsearch/http/netty4/Netty4HttpServerTransport.java
+++ b/modules/transport-netty4/src/main/java/org/elasticsearch/http/netty4/Netty4HttpServerTransport.java
@@ -367,7 +367,7 @@ protected HttpMessage createMessage(String[] initialLine) throws Exception {
             // combines the HTTP message pieces into a single full HTTP request (with headers and body)
             final HttpObjectAggregator aggregator = new Netty4HttpAggregator(
                 handlingSettings.maxContentLength(),
-                httpPreRequest -> httpPreRequest.uri().startsWith("/_bulk") == false
+                httpPreRequest -> httpPreRequest.uri().contains("/_bulk") == false
             );
             aggregator.setMaxCumulationBufferComponents(transport.maxCompositeBufferComponents);
             ch.pipeline()