diff --git a/src/login/KcContext/KcContext.ts b/src/login/KcContext/KcContext.ts
index 68a685de..4b9c91e6 100644
--- a/src/login/KcContext/KcContext.ts
+++ b/src/login/KcContext/KcContext.ts
@@ -580,7 +580,7 @@ export declare namespace KcContext {
         url: {
             registrationUrl: string;
         };
-        registrationDisabled: boolean;
+        registrationDisabled?: boolean;
         isUserIdentified: boolean | "true" | "false";
         challenge: string;
         userVerification: string;