diff --git a/core/js/login/grant.js b/core/js/login/grant.js
index c8913f937bb83..c458bbbab8488 100644
--- a/core/js/login/grant.js
+++ b/core/js/login/grant.js
@@ -6,5 +6,6 @@ document.querySelector('form').addEventListener('submit', function(e) {
 	wrapper.getElementsByClassName('icon-confirm-white').forEach(function(el) {
 		el.classList.remove('icon-confirm-white')
 		el.classList.add(OCA.Theming && OCA.Theming.inverted ? 'icon-loading-small' : 'icon-loading-small-dark')
+		el.disabled = true
 	})
 })