diff --git a/Sources/Martin/modules/roster/DefaultRosterStore.swift b/Sources/Martin/modules/roster/DefaultRosterStore.swift
index 20eea83..bc6622f 100644
--- a/Sources/Martin/modules/roster/DefaultRosterStore.swift
+++ b/Sources/Martin/modules/roster/DefaultRosterStore.swift
@@ -34,7 +34,9 @@ open class DefaultRosterStore: RosterStore {
     private var version: String?;
     
     private let dispatcher = DispatchQueue(label: "DefaultRoomStore");
-    
+
+    public init() {}
+
     public func clear(for context: Context) {
         return dispatcher.async {
             self.version = nil;