diff --git a/ciao-controller/openstack_volume.go b/ciao-controller/openstack_volume.go
index 5cfd10b2f..0f6b0c06e 100644
--- a/ciao-controller/openstack_volume.go
+++ b/ciao-controller/openstack_volume.go
@@ -279,7 +279,7 @@ func (c *controller) ListVolumes(tenant string) ([]block.ListVolume, error) {
 }
 
 func (c *controller) ListVolumesDetail(tenant string) ([]block.VolumeDetail, error) {
-	var vols []block.VolumeDetail
+	vols := []block.VolumeDetail{}
 
 	err := c.confirmTenant(tenant)
 	if err != nil {