diff --git a/src/matrix/registration/stages/BaseRegistrationStage.ts b/src/matrix/registration/stages/BaseRegistrationStage.ts
index 426dbf2c..71972a64 100644
--- a/src/matrix/registration/stages/BaseRegistrationStage.ts
+++ b/src/matrix/registration/stages/BaseRegistrationStage.ts
@@ -36,6 +36,7 @@ export abstract class BaseRegistrationStage {
      * This method should return auth part that must be provided to
      * /register endpoint to successfully complete this stage
      */
+    /** @internal */
     abstract generateAuthenticationData(): AuthenticationData;
 
     setNextStage(stage: BaseRegistrationStage) {