diff --git a/src/core/ddsi/src/q_config.c b/src/core/ddsi/src/q_config.c
index 2aec54c..7664e8d 100644
--- a/src/core/ddsi/src/q_config.c
+++ b/src/core/ddsi/src/q_config.c
@@ -830,6 +830,7 @@ static const struct cfgelem root_cfgelems[] = {
 };
 
 static const struct cfgelem root_cfgattrs[] = {
+  { ATTR("xmlns"), 0, "", 0, 0, 0, uf_nop, 0, pf_nop, NULL },
   { ATTR("xmlns:xsi"), 0, "", 0, 0, 0, uf_nop, 0, pf_nop, NULL },
   { ATTR("xsi:noNamespaceSchemaLocation"), 0, "", 0, 0, 0, uf_nop, 0, pf_nop, NULL },
   END_MARKER