diff --git a/commons-datastore/commons-datastore-mongodb/src/main/java/org/opencb/commons/datastore/mongodb/MongoDBDocumentToFacetFieldsConverter.java b/commons-datastore/commons-datastore-mongodb/src/main/java/org/opencb/commons/datastore/mongodb/MongoDBDocumentToFacetFieldsConverter.java
index 5fc535b4..87588d58 100644
--- a/commons-datastore/commons-datastore-mongodb/src/main/java/org/opencb/commons/datastore/mongodb/MongoDBDocumentToFacetFieldsConverter.java
+++ b/commons-datastore/commons-datastore-mongodb/src/main/java/org/opencb/commons/datastore/mongodb/MongoDBDocumentToFacetFieldsConverter.java
@@ -78,9 +78,10 @@ public List<FacetField> convertToDataModelType(Document document) {
                 Document documentValue = ((List<Document>) entry.getValue()).get(0);
                 MongoDBQueryUtils.Accumulator accumulator = getAccumulator(documentValue);
                 switch (accumulator) {
+                    case avg:
+                    case sum:
                     case max:
                     case min:
-                    case avg:
                     case stdDevPop:
                     case stdDevSamp: {
                         List<Double> fieldValues = new ArrayList<>();