diff --git a/less/modals.less b/less/modals.less
index 1de622050e..767ce36ba3 100644
--- a/less/modals.less
+++ b/less/modals.less
@@ -79,7 +79,7 @@
 .modal-header {
   padding: @modal-title-padding;
   border-bottom: 1px solid @modal-header-border-color;
-  min-height: (@modal-title-padding + @modal-title-line-height);
+  &:extend(.clearfix all);
 }
 // Close icon
 .modal-header .close {