diff --git a/plugins/samplesource/audioinput/readme.md b/plugins/samplesource/audioinput/readme.md
index aed7270bb..c60ba3831 100644
--- a/plugins/samplesource/audioinput/readme.md
+++ b/plugins/samplesource/audioinput/readme.md
@@ -20,7 +20,7 @@ Device start / stop button.
 
 The audio device to use.
 
-<h3>3: Refresh devices<h3>
+<h3>3: Refresh devices</h3>
 
 Refresh the list of audio devices.