diff --git a/src/main/resources/application-context-ontology-model-service.xml b/src/main/resources/application-context-ontology-model-service.xml
index 1d4d58b8..de7dd0c7 100644
--- a/src/main/resources/application-context-ontology-model-service.xml
+++ b/src/main/resources/application-context-ontology-model-service.xml
@@ -70,7 +70,7 @@
 
 				SELECT ?annotation_property_uri
 				WHERE {
-						<$CONCEPT_URI> rdfs:subPropertyOf* ?annotation_property_uri .
+						<$CONCEPT_URI> (owl:equivalentProperty|^owl:equivalentProperty)*/rdfs:subPropertyOf* ?annotation_property_uri .
 				 	}
 				 ]]>
 			</value>
diff --git a/src/test/java/org/dataone/cn/indexer/annotation/OntologyModelServiceTest.java b/src/test/java/org/dataone/cn/indexer/annotation/OntologyModelServiceTest.java
index 3b77812e..e1954e69 100644
--- a/src/test/java/org/dataone/cn/indexer/annotation/OntologyModelServiceTest.java
+++ b/src/test/java/org/dataone/cn/indexer/annotation/OntologyModelServiceTest.java
@@ -200,4 +200,21 @@ public void testNamedIndividualExpansion() {
 			fail(e.getMessage());
 		}
 	}
+
+	@Test
+	public void testEquivalentPropertyExpansion() {
+		try {
+			Map<String, Set<String>> concepts = OntologyModelService.getInstance().expandConcepts("https://purl.dataone.org/odo/MOSAIC_00002250");
+
+			Set<String> values = new HashSet<String>();
+			values.add("http://www.w3.org/ns/ssn/deployedSystem");
+			values.add("https://purl.dataone.org/odo/MOSAIC_00002250");
+
+			assertEquals(values, concepts.get("annotation_property_uri"));
+		} catch (Exception e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+			fail(e.getMessage());
+		}
+	}
 }