diff --git a/dspace/config/dspace.cfg b/dspace/config/dspace.cfg
index bbef643512de..b4e729d2db3d 100644
--- a/dspace/config/dspace.cfg
+++ b/dspace/config/dspace.cfg
@@ -281,6 +281,8 @@ identifier.doi.prefix = 10.5072
 # it from other services also minting DOIs under your prefix?
 identifier.doi.namespaceseparator = dspace/
 
+# if you want, you can specify custom metadata field for doi identifier
+# if nothing specified, then will be used dc.identifier.doi as default
 identifier.doi.metadata = dc.identifier.doi
 
 ##### Edit Item configurations #####