diff --git a/doc/source/architecture.rst b/doc/source/architecture.rst
index 5bae7661d5..e80ca48e22 100644
--- a/doc/source/architecture.rst
+++ b/doc/source/architecture.rst
@@ -84,7 +84,7 @@ In the Identity v3 API, the uniqueness of attributes is as follows:
 
 - Domain Name. Globally unique across all domains.
 
-- Role Name. Globally unique across all domains.
+- Role Name. Unique within the owning domain.
 
 - User Name. Unique within the owning domain.