diff --git a/model/sharing/files.go b/model/sharing/files.go
index da6b3001a9e..33e49170f88 100644
--- a/model/sharing/files.go
+++ b/model/sharing/files.go
@@ -1404,7 +1404,10 @@ func fileToJSONDoc(file *vfs.FileDoc, instanceURL string) couchdb.JSONDoc {
 		doc.M["restore_path"] = file.RestorePath
 	}
 	if len(file.Metadata) > 0 {
-		doc.M["metadata"] = file.Metadata.RemoveCertifiedMetadata()
+		meta := file.Metadata
+		meta = meta.RemoveCertifiedMetadata()
+		meta = meta.RemoveFavoriteMetadata()
+		doc.M["metadata"] = meta
 	}
 	fcm := file.CozyMetadata
 	if fcm == nil {
diff --git a/model/vfs/metadata.go b/model/vfs/metadata.go
index b5c0ea8b8b9..9142a3c95eb 100644
--- a/model/vfs/metadata.go
+++ b/model/vfs/metadata.go
@@ -60,6 +60,23 @@ func MergeMetadata(doc *FileDoc, meta Metadata) {
 	}
 }
 
+// RemoveFavoriteMetadata returns a metadata map where the favorite key has been
+// removed. It can be useful for sharing, as favorite metadata are only valid
+// localy.
+func (m Metadata) RemoveFavoriteMetadata() Metadata {
+	if len(m) == 0 {
+		return Metadata{}
+	}
+	result := make(Metadata, len(m))
+	for k, v := range m {
+		if k == consts.FavoriteKey {
+			continue
+		}
+		result[k] = v
+	}
+	return result
+}
+
 // RemoveCertifiedMetadata returns a metadata map where the keys that are
 // certified have been removed. It can be useful for sharing, as certified
 // metadata are only valid localy.
diff --git a/pkg/consts/file.go b/pkg/consts/file.go
index e9a622949a6..4e309c080a9 100644
--- a/pkg/consts/file.go
+++ b/pkg/consts/file.go
@@ -35,6 +35,8 @@ const (
 	CarbonCopyKey = "carbonCopy"
 	// ElectronicSafeKey is the metadata key for an electronic safe (certified)
 	ElectronicSafeKey = "electronicSafe"
+	// FavoriteKey is the metadata key for a favorite.
+	FavoriteKey = "favorite"
 )
 
 const (