diff --git a/pkg/share/manager/nextcloud/nextcloud.go b/pkg/share/manager/nextcloud/nextcloud.go
index 6d5f3dc9285..3b1de3d1e57 100644
--- a/pkg/share/manager/nextcloud/nextcloud.go
+++ b/pkg/share/manager/nextcloud/nextcloud.go
@@ -61,12 +61,14 @@ type Action struct {
 	argS string
 }
 
+// GranteeAltMap is an alternative map to JSON-unmarshal a Grantee
 // Grantees are hard to unmarshal, so unmarshalling into a map[string]interface{} first,
 // see also https://github.com/pondersource/sciencemesh-nextcloud/issues/27
 type GranteeAltMap struct {
 	ID *provider.Grantee_UserId `json:"id"`
 }
 
+// ShareAltMap is an alternative map to JSON-unmarshal a Share
 type ShareAltMap struct {
 	ID          *collaboration.ShareId          `json:"id"`
 	ResourceID  *provider.ResourceId            `json:"resource_id"`
@@ -78,6 +80,7 @@ type ShareAltMap struct {
 	Mtime       *types.Timestamp                `json:"mtime"`
 }
 
+// ReceivedShareAltMap is an alternative map to JSON-unmarshal a ReceivedShare
 type ReceivedShareAltMap struct {
 	Share *ShareAltMap             `json:"share"`
 	State collaboration.ShareState `json:"state"`