Rename Result.Resp to Result.Body.
diff --git a/openstack/blockstorage/v1/apiversions/results.go b/openstack/blockstorage/v1/apiversions/results.go
index c2ec935..7b0df11 100644
--- a/openstack/blockstorage/v1/apiversions/results.go
+++ b/openstack/blockstorage/v1/apiversions/results.go
@@ -52,7 +52,7 @@
 		Version *APIVersion `mapstructure:"version"`
 	}
 
-	err := mapstructure.Decode(r.Resp, &resp)
+	err := mapstructure.Decode(r.Body, &resp)
 
 	return resp.Version, err
 }