diff --git a/app/css/app.css b/app/css/app.css
index 66db3838..aa3204ea 100644
--- a/app/css/app.css
+++ b/app/css/app.css
@@ -780,6 +780,11 @@ a.tg_radio_on:hover i.icon-radio {
   margin: 15px 0 30px;
   font-size: 13px;
 }
+.login_form_messaging {
+  color: #959595;
+  font-size: 13px;
+  margin-top: 10px;
+}
 
 .login_country_selector {
   cursor: pointer;
diff --git a/app/partials/login.html b/app/partials/login.html
index 7169b457..09ad4c21 100644
--- a/app/partials/login.html
+++ b/app/partials/login.html
@@ -24,6 +24,7 @@
       <span ng-switch-when="true">Generating keys<span my-loading-dots></span></span>
       <span ng-switch-default>Next</span>
     </button>
+    <div class="login_form_messaging" ng-show="progress.enabled">Key generation will only happen once, it could take several minutes on slower devices, please be patient.</div>
   </form>
 
   <form name="myLoginForm" ng-if="credentials.phone_code_hash &amp;&amp; !credentials.phone_code_valid" ng-submit="logIn()">