diff --git a/app/src/main/java/com/futo/circles/core/Constants.kt b/app/src/main/java/com/futo/circles/core/Constants.kt
index a97f05ec1baacf0342e277a9a28173ee5ed7d530..8bd7c5d8a85c5d9fa0e40826dd6e62147808ed24 100644
--- a/app/src/main/java/com/futo/circles/core/Constants.kt
+++ b/app/src/main/java/com/futo/circles/core/Constants.kt
@@ -6,3 +6,5 @@ const val REGISTRATION_TOKEN_KEY = "org.matrix.msc3231.login.registration_token"
 
 const val TERMS_URL_EXTENSION = "_matrix/consent"
 const val VALIDATION_TOKEN_SUBMIT_URL_PREFIX = "_matrix/identity/api/v1/validate/email/submitToken"
+
+const val DEFAULT_USER_PREFIX = "@notices:"