diff --git a/controllers/login.js b/controllers/login.js
index 7c6dd1ce05..45285445fe 100644
--- a/controllers/login.js
+++ b/controllers/login.js
@@ -468,6 +468,13 @@ router.get('/logout/', (req, res, next) => {
 		.catch((err) => {
 			logger.error('error during logout.', formatError(err));
 		});
+
+	api(req, { version: 'v3' })
+		.del('/collaborative-text-editor/delete-sessions') // async, ignore result
+		.catch((err) => {
+			logger.error('can not delete etherpad client sessions', formatError(err));
+		});
+
 	return authHelper.clearCookie(req, res, sessionDestroyer)
 	// eslint-disable-next-line prefer-template, no-return-assign
 		.then(() => {
diff --git a/helpers/authentication.js b/helpers/authentication.js
index 27e8e8c81b..3e0b02e32b 100644
--- a/helpers/authentication.js
+++ b/helpers/authentication.js
@@ -64,6 +64,7 @@ const clearCookie = async (req, res, options = { destroySession: false }) => {
 			});
 		});
 	}
+	
 	res.clearCookie('jwt');
 	// this is deprecated and only used for cookie removal from now on,
 	// and can be removed after one month (max cookie lifetime from life systems)