diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03888bca2a..8e39449002 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,8 @@ way to update this template, but currently, we follow a pattern:
 
 ## Upcoming version 2020-XX-XX
 
+- [fix] Don't pass protected data key through `ConfirmSignupForm` if protected data is empty.
+  [#1370](https://github.com/sharetribe/ftw-daily/pull/1370)
 - [add] Update French translation file (Spanish and German translations have still missing keys).
   [#1369](https://github.com/sharetribe/ftw-daily/pull/1369)
 - [fix] Pass additional values from `ConfirmSignupForm` forward as user's protected data.
diff --git a/src/containers/AuthenticationPage/AuthenticationPage.js b/src/containers/AuthenticationPage/AuthenticationPage.js
index 5268e8092e..2f6f006a50 100644
--- a/src/containers/AuthenticationPage/AuthenticationPage.js
+++ b/src/containers/AuthenticationPage/AuthenticationPage.js
@@ -195,7 +195,7 @@ export class AuthenticationPageComponent extends Component {
         idpToken,
         idpId,
         ...authParams,
-        protectedData,
+        ...(!!protectedData && { protectedData }),
       });
     };