diff --git a/src/domain/session/leftpanel/BaseTileViewModel.js b/src/domain/session/leftpanel/BaseTileViewModel.js
index 7b2a3258..ac9ea3f9 100644
--- a/src/domain/session/leftpanel/BaseTileViewModel.js
+++ b/src/domain/session/leftpanel/BaseTileViewModel.js
@@ -72,7 +72,7 @@ export class BaseTileViewModel extends ViewModel {
     }
 
     get avatarColorNumber() {
-        return getIdentifierColorNumber(this._avatarSource)
+        return getIdentifierColorNumber(this._avatarSource.id)
     }
 
     get avatarUrl() {