diff --git a/extensions/markdown/js/src/forum/components/MarkdownButton.js b/extensions/markdown/js/src/forum/components/MarkdownButton.js
index 457380167..dce1378fa 100644
--- a/extensions/markdown/js/src/forum/components/MarkdownButton.js
+++ b/extensions/markdown/js/src/forum/components/MarkdownButton.js
@@ -11,6 +11,7 @@ export default class MarkdownButton extends Component {
     const button = (
       <button
         className="Button Button--icon Button--link"
+        type="button"
         data-hotkey={this.attrs.hotkey}
         onkeydown={this.keydown.bind(this)}
         onclick={this.attrs.onclick}