diff --git a/ceilometer/data/meters.d/meters.yaml b/ceilometer/data/meters.d/meters.yaml
index d368734c44..1b39d6224d 100644
--- a/ceilometer/data/meters.d/meters.yaml
+++ b/ceilometer/data/meters.d/meters.yaml
@@ -128,7 +128,7 @@ metric:
     metadata:
       display_name: $.payload.display_name
       volume_type: $.payload.volume_type
-      image_id: $.payload.glance_metadata[?key=image_id][0].value
+      image_id: $.payload.glance_metadata[?key=image_id].value
       instance_id: $.payload.volume_attachment[0].server_id
 
   - name: 'snapshot.size'
diff --git a/ceilometer/pipeline/data/event_definitions.yaml b/ceilometer/pipeline/data/event_definitions.yaml
index b77183a9d8..e03f5dad96 100644
--- a/ceilometer/pipeline/data/event_definitions.yaml
+++ b/ceilometer/pipeline/data/event_definitions.yaml
@@ -86,7 +86,7 @@
     created_at:
       fields: payload.created_at
     image_id:
-      fields: payload.glance_metadata[?key=image_id][0].value
+      fields: payload.glance_metadata[?key=image_id].value
     instance_id:
       fields: payload.volume_attachment[0].server_id
 - event_type: ['volume.exists', 'volume.create.*', 'volume.delete.*', 'volume.resize.*', 'volume.attach.*', 'volume.detach.*', 'volume.update.*']