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-rw-r--r--docs/4.0/components/collapse.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/4.0/components/collapse.md b/docs/4.0/components/collapse.md
index 0e914a264..8c26630f9 100644
--- a/docs/4.0/components/collapse.md
+++ b/docs/4.0/components/collapse.md
@@ -66,7 +66,7 @@ Multiple `<button>` or `<a>` can show and hide an element if they each reference
Using the [card]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/card/) component, you can extend the default collapse behavior to create an accordion.
{% example html %}
-<div id="accordion">
+<div class="accordion" id="accordion">
<div class="card">
<div class="card-header" id="headingOne">
<h5 class="mb-0">