diff --git a/war/src/main/less/modules/form.less b/war/src/main/less/modules/form.less
index 3de2c0c2eb75..e0c8cd18d349 100644
--- a/war/src/main/less/modules/form.less
+++ b/war/src/main/less/modules/form.less
@@ -12,6 +12,10 @@
   &--medium {
     max-width: 450px;
   }
+
+  &--full-width {
+    max-width: none;
+  }
 }
 
 .jenkins-fieldset {