diff --git a/raystack/frontier/v1beta1/admin.proto b/raystack/frontier/v1beta1/admin.proto
index 7cd39679..099df1d3 100644
--- a/raystack/frontier/v1beta1/admin.proto
+++ b/raystack/frontier/v1beta1/admin.proto
@@ -358,6 +358,10 @@ message ListPlatformUsersResponse {
 message RemovePlatformUserRequest {
   string user_id = 1;
   string serviceuser_id = 2;
+
+  // relation scopes the removal to a single platform relation (admin or member).
+  // When empty, all platform relations of the principal are removed.
+  string relation = 3;
 }
 
 message RemovePlatformUserResponse {}