diff --git a/lms/static/sass/views/_login-register.scss b/lms/static/sass/views/_login-register.scss
index 6565bd8c8c..93e94a686c 100644
--- a/lms/static/sass/views/_login-register.scss
+++ b/lms/static/sass/views/_login-register.scss
@@ -456,7 +456,7 @@ $sm-btn-linkedin: #0077b5;
         background: tint($yellow,20%);
 
         .message-title {
-            @extend %t-title4;
+            @extend %t-title5;
             font-family: $sans-serif;
             margin: 0 0 ($baseline/4) 0;
             font-weight: 600;