diff --git a/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/AbstractElasticsearchBucketAggregation.java b/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/AbstractElasticsearchBucketAggregation.java
index ecb88d2d6bd..97c05636e6e 100644
--- a/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/AbstractElasticsearchBucketAggregation.java
+++ b/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/AbstractElasticsearchBucketAggregation.java
@@ -23,6 +23,9 @@
 public abstract class AbstractElasticsearchBucketAggregation<K, V>
 		extends AbstractElasticsearchNestableAggregation<Map<K, V>> {
 
+	protected static final JsonAccessor<JsonObject> REQUEST_AGGREGATIONS_ACCESSOR =
+			JsonAccessor.root().property( "aggregations" ).asObject();
+
 	private static final JsonAccessor<JsonObject> REQUEST_REVERSE_NESTED_ACCESSOR =
 			JsonAccessor.root().property( "reverse_nested" ).asObject();
 
@@ -30,7 +33,6 @@ public abstract class AbstractElasticsearchBucketAggregation<K, V>
 	private static final JsonAccessor<JsonObject> REQUEST_AGGREGATIONS_ROOT_DOC_COUNT_ACCESSOR =
 			JsonAccessor.root().property( "aggregations" ).property( ROOT_DOC_COUNT_NAME ).asObject();
 
-	protected static final String INNER_EXTRACTOR_KEY = "innerExtractorKey";
 	protected static final String INNER_EXTRACTOR = "innerExtractor";
 
 	AbstractElasticsearchBucketAggregation(AbstractBuilder<K, V> builder) {
diff --git a/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchRangeAggregation.java b/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchRangeAggregation.java
index 8833231202e..78806a11345 100644
--- a/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchRangeAggregation.java
+++ b/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchRangeAggregation.java
@@ -66,7 +66,7 @@ protected void doRequest(JsonObject outerObject, JsonObject innerObject, Aggrega
 				aggregation.request( context, AggregationKey.of( "agg" ), subOuterObject ) );
 
 		if ( !subOuterObject.isEmpty() ) {
-			outerObject.add( "aggs", subOuterObject );
+			REQUEST_AGGREGATIONS_ACCESSOR.set( outerObject, subOuterObject );
 		}
 	}
 
diff --git a/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchTermsAggregation.java b/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchTermsAggregation.java
index c4dddb53813..f19a8027e91 100644
--- a/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchTermsAggregation.java
+++ b/backend/elasticsearch/src/main/java/org/hibernate/search/backend/elasticsearch/search/aggregation/impl/ElasticsearchTermsAggregation.java
@@ -72,7 +72,7 @@ protected void doRequest(JsonObject outerObject, JsonObject innerObject, Aggrega
 				aggregation.request( context, AggregationKey.of( "agg" ), subOuterObject ) );
 
 		if ( !subOuterObject.isEmpty() ) {
-			outerObject.add( "aggs", subOuterObject );
+			REQUEST_AGGREGATIONS_ACCESSOR.set( outerObject, subOuterObject );
 		}
 	}