diff --git a/src/ruleset.rnc b/src/ruleset.rnc
index 08d32154b75e6184c8bffa69eabae084bb4921e9..8cfa64ecca5ac3dbcca68018c09568233e976c27 100644
--- a/src/ruleset.rnc
+++ b/src/ruleset.rnc
@@ -191,7 +191,7 @@ MetsModsSerializationValueRegExp =
    element ValueRegExp { text }
 
 MetsModsSerializationMetadataMapping =
-   element metadata {
+   element Metadata {
       MetsModsSerializationInternalName
     & MetsModsSerializationPersonIndicator?
     & element WriteXPath { WriteXPathContent }