diff --git a/docs/deviceSpec.md b/docs/deviceSpec.md
index e22e10c..d1f179f 100644
--- a/docs/deviceSpec.md
+++ b/docs/deviceSpec.md
@@ -90,7 +90,7 @@ If `/dev/video0` is already consumed by another process, this may likely fail.
 
 ### To attach a microphone that's managed by ALSA server:
 ```
-audio-implexor|alsa|alsa(shmem)|cardname
+audio-implexor|alsa(shmem)|alsa()|cardname
 ```
 
 Connect to the ALSA server via `shmem`, using the `alsa` API. Request access to