diff --git a/docs/components/forms.md b/docs/components/forms.md
index bbf55eda89..46217e383e 100644
--- a/docs/components/forms.md
+++ b/docs/components/forms.md
@@ -675,7 +675,7 @@ Inline text can use any typical inline HTML element (be it a `<small>`, `<span>`
 <form class="form-inline">
   <div class="form-group">
     <label for="inputPassword4">Password</label>
-    <input type="password" id="inputPassword4" class="form-control" aria-describedby="passwordHelpInline">
+    <input type="password" id="inputPassword4" class="form-control mx-sm-3" aria-describedby="passwordHelpInline">
     <small id="passwordHelpInline" class="text-muted">
       Must be 8-20 characters long.
     </small>