diff --git a/roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml
index a77bcf750..e6f59a1ea 100644
--- a/roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml
@@ -226,7 +226,7 @@ matrix_mautrix_whatsapp_registration_yaml: |
   rate_limited: false
   namespaces:
       users:
-      - regex: '^@whatsapp_[0-9]+:{{ matrix_mautrix_whatsapp_homeserver_domain | regex_escape }}$'
+      - regex: '^@whatsapp_.*:{{ matrix_mautrix_whatsapp_homeserver_domain | regex_escape }}$'
         exclusive: true
       - exclusive: true
         regex: '^@{{ matrix_mautrix_whatsapp_appservice_bot_username | regex_escape }}:{{ matrix_mautrix_whatsapp_homeserver_domain | regex_escape }}$'