diff --git a/packages/oui-collapsible/src/collapsible.html b/packages/oui-collapsible/src/collapsible.html
index 4d07be79..9ec34470 100644
--- a/packages/oui-collapsible/src/collapsible.html
+++ b/packages/oui-collapsible/src/collapsible.html
@@ -1,4 +1,5 @@
 <button class="oui-button oui-button_full-width oui-collapsible__header"
+    type="button"
     ng-click="$ctrl.toggle()"
     aria-label="{{::$ctrl.ariaLabel}}"
     aria-expanded="{{$ctrl.expanded}}"