diff --git a/search-services/alfresco-search/src/main/java/org/alfresco/solr/SolrInformationServer.java b/search-services/alfresco-search/src/main/java/org/alfresco/solr/SolrInformationServer.java
index 57db26d59..d3f6647d4 100644
--- a/search-services/alfresco-search/src/main/java/org/alfresco/solr/SolrInformationServer.java
+++ b/search-services/alfresco-search/src/main/java/org/alfresco/solr/SolrInformationServer.java
@@ -2174,7 +2174,7 @@ public class SolrInformationServer implements InformationServer
                     }
                     qNameBuffer.append(ISO9075.getXPathName(childAssocRef.getQName()));
                     assocTypeQNameBuffer.append(ISO9075.getXPathName(childAssocRef.getTypeQName()));
-                    doc.setField(FIELD_PARENT, childAssocRef.getParentRef().toString());
+                    doc.addField(FIELD_PARENT, childAssocRef.getParentRef().toString());
 
                     if (childAssocRef.isPrimary())
                     {