diff --git a/src/ontology/uberon-edit.obo b/src/ontology/uberon-edit.obo
index 9dba08d5f..415c89279 100644
--- a/src/ontology/uberon-edit.obo
+++ b/src/ontology/uberon-edit.obo
@@ -45,6 +45,7 @@ synonymtypedef: PENDING_REVIEW "expert consultation and attribution required"
 synonymtypedef: SENSU "taxonomic disambiguation"
 synonymtypedef: SYSTEMATIC "a systematic synonym used as the base name for design patterns"
 default-namespace: uberon
+idspace: EFO http://www.ebi.ac.uk/efo/EFO_
 treat-xrefs-as-equivalent: AEO
 treat-xrefs-as-equivalent: BILA
 treat-xrefs-as-equivalent: BSPO