diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/search/sort/SortParseElement.java b/modules/elasticsearch/src/main/java/org/elasticsearch/search/sort/SortParseElement.java
index f5e1cba9833..021269dbdc4 100644
--- a/modules/elasticsearch/src/main/java/org/elasticsearch/search/sort/SortParseElement.java
+++ b/modules/elasticsearch/src/main/java/org/elasticsearch/search/sort/SortParseElement.java
@@ -142,7 +142,7 @@ public class SortParseElement implements SearchParseElement {
             if (fieldMapper == null) {
                 throw new SearchParseException(context, "No mapping found for [" + fieldName + "]");
             }
-            sortFields.add(new SortField(fieldName, fieldMapper.fieldDataType().newFieldComparatorSource(context.fieldDataCache(), missing), reverse));
+            sortFields.add(new SortField(fieldMapper.names().indexName(), fieldMapper.fieldDataType().newFieldComparatorSource(context.fieldDataCache(), missing), reverse));
         }
     }
 }