diff --git a/docs/components/forms.md b/docs/components/forms.md
index 90f3e38dcf..ea8d3ee54e 100644
--- a/docs/components/forms.md
+++ b/docs/components/forms.md
@@ -484,9 +484,9 @@ Add the `readonly` boolean attribute on an input to prevent modification of the
 Set heights using classes like `.form-control-lg`, and set widths using grid column classes like `.col-lg-*`.
 
 {% example html %}
-<input class="form-control form-control-lg" type="text" placeholder=".input-lg">
+<input class="form-control form-control-lg" type="text" placeholder=".form-control-lg">
 <input class="form-control" type="text" placeholder="Default input">
-<input class="form-control form-control-sm" type="text" placeholder=".input-sm">
+<input class="form-control form-control-sm" type="text" placeholder=".form-control-sm">
 {% endexample %}
 
 {% example html %}